tained an injunction against its occurrence. Therefore, PCF and RCS have waived any objections based on statutorily required noticing of the sale and whether those alleged deficiencies were grounds for setting the sale aside.
¶ 24 TD argues, however, that pursuant to the plain language of the statute, a trustee “is not one of the enumerated parties subject to the time limitation of A.R.S. § 33 — 811(C).” We agree that A.R.S. § 33-811(C) is not directly applicable to TD. Nevertheless, for the reasons discussed above, TD could not set aside the sale in its capacity as trustee because the statutory scheme did not give it the authority to do so. To the extent TD is attempting to assert the interests of PCF, for whom it was acting as an agent, it has no more rights than PCF would have and A.R.S. § 33-81KC) would apply.
¶ 25 TD and PCF assert the principle that the statutory provisions for non-judicial deed of trust sales must be strictly followed or a sale is void. See Patton v. First Fed. Sav. & Loan Ass’n of Phoenix, 118 Ariz. 473, 476, 578 P.2d 152, 155 (1978). Subsection C was added to A.R.S. § 33-811 in 2002, after Patton was decided. See 2002 Ariz. Sess. Laws, ch. 259, § 3. We presume that the legislature is aware of the existing state of the law interpreting a statute and therefore, intends to change the law when it amends a statute. Bither v. Country Mut. Ins. Co., 226 Ariz. 198, 201 n. 5, ¶ 11, 245 P.3d 883, 886 n. 5 (App.2010); State v. Hamblin, 217 Ariz. 481, 484, ¶ 11, 176 P.3d 49, 52 (App.2008). Although a trustee’s failure to strictly comply with the statutory provisions is a defense or a ground for objection to the sale, A.R.S. § 33-811(C) requires an objecting party who received notice to obtain an injunction no later than 5:00 p.m. on the day before the sale is held. To permit an objecting party who did not obtain an injunction prior to the sale to void a sale would render A.R.S. § 33-811(C) meaningless. See CNL Hotels & Resorts, Inc. v. Maricopa County, 226 Ariz. 155, 159, ¶ 15, 244 P.3d 592, 596 (App.2010) (“In interpreting statutes, courts are under a duty to give statutes operation and effect and should avoid a construction that leaves the statute meaningless or of no effect.” (quoting St. Joseph’s Hosp. & Med. Ctr. v. Maricopa County, 130 Ariz. 239, 248, 635 P.2d 527, 536 (App.1981))). Consequently, we conclude that neither TD nor PCF could invalidate the sale for procedural errors after BT was recognized as the high bidder.
¶26 Similarly, we reject PCF and TD’s assertion that the sale was void for lack of proper notice to Propcor. TD’s failure to provide notice to Propcor would not invalidate a completed trustee’s sale. See A.R.S. § 33-808(E) (stating that an error or omission “other than an error in the legal description of the trust property or an error in the date, time or place of the sale, shall not invalidate a trustee’s sale.” (emphasis added)). Moreover, Propcor was not a party to the trial court proceedings, nor is it a party in this appeal. Therefore, we need not decide if its interests were affected by any failure to give it notice.
¶ 27 TD also argues that because it was not sufficiently included in a written document or documents the alleged contract violates the statute of frauds. See A.R.S. § 44-101 (2003). TD did not raise the statute of frauds in the trial court. PCF discussed the issue in its motion to dismiss, but did not argue it again in its reply and does not raise the statute of frauds in its brief on appeal. Moreover, the trial court did not base its ruling on the statute of frauds. Because TD did not raise the issue below, and PCF does not raise it here, the issue is not properly before us. See Westin Tucson Hotel Co. v. State Dep’t of Revenue, 188 Ariz. 360, 364, 936 P.2d 183, 188 (App.1997) (noting issues not raised in the trial court are waived); see also Ariz.R.Civ.P. 13(a)(5) (stating that an appellate brief shall contain a “statement of the issues presented for review.”).
¶ 28 Similarly, in this appeal we reject the argument that the alleged noon sale renders the later sale the same day void. The issue was only raised in the trial court in PCF’s supplemental reply. Nothing in the record indicates that the trial court considered it, so we will not address it here.
¶ 29 For purposes of this appeal, we accept that TD failed to follow PCF’s instructions and it apparently was this failure that allowed BT’s bid to prevail. Nevertheless,