Unresolved Billing Issue

On June 15th I made a payment to our internet account, and on the same day we decided to upgrade our router to a 5G router. We called phone number [EDIT: Private Information] and spoke to a Xfinity Rep who helped us just fine. However in order to get the router transaction to go through we need to make a payment with him so it would show immediately as the payment I made would not post soon enough. So my wife used her debit card and made the payment, and somehow it went through her pay-pal and posted to paid Xfinity as did my payment. We were advised the other payment would credit to our account to use for the next month. We'll that never happened and I made another payment for July on July 10th. Then July 29th I recieved a text message to avoid disconnect pay 42.96 so I made the payment and still had a balance of just over 115. We also somehow had an E-check trying to post to our Xfinity account which kept denying and causing return fees to our account. We spoke to the fraud department and they determined that the account was somehow hacked concerning the E-check issue but the extra payment has never shown up as a credit to our Xfinity account or either of our bank accounts. I want this resolved because I will not be out almost 80 dollars. Not to mention the rep said shipping on the router was o.oo dollars there is a 15 dollar charge on my account as well. Please resolve this issue. Every phone number we dial for Xfinity is a over seas call center to boot very frustrating when your rep has such a heavy accent you can't understand them.