Business ProfileforUT Health East Texas

I am trying to talk with someone in the UT Health East Texas Business office who can help me resolve a billing problem. I have talked with the centralized billing department every month since April 2023 and 20 times since then in attempt to straighten out the problem. They cannot help me nor get me to the right person. I attempt to call the business office in Tyler TX and only reach the centralized billing department. I ask for customer complaint department, customer service and get nobody. I received a bill of $152.52 for account # *********** an accidentally went to my bill pay and paid a prior UT Health P.O. Box 700 Tyler TX instead of this one. I realized I paid UT Health but not the right account number, nor the right department. I requested a copy of the cancelled check from my bank and sent it to the billing dept. It showed the money was received by the UTH Business Office 3/23/23. According to the endorsement on the back of the check, it was deposited in the bank account for the ************** Hospital LLC. ********* account ********* at ********* Bank. The money was suppose to go to account #*********** at UT Health East TX P.O. Box 226327, Dallas TX for service rendered by UT Health ****** 2000S Palestine St. I assume it went to account #*********** Rehab since this was hand written on the front of the check by someone I assume in the Business receiving office. All I want is someone to provide me with a refund and I will pay the correct department, submit the payment as a payment on the account #*********** or provide me with an itemized statement showing what account the money was applied to and why. I cannot reach anyone who can help me. I do not know who to call. I am contacting you to see if you can get me help. Billing # **************. One person said a note on the account 9/6/2023 that Rehab applied $ to a Legacy account. No other info. I need verification Rehab was entitled to keep that check from an itemized statement.