Xfinity equipment returns service frustrating experience

HI,

My wife took over the XFINITY account under her name. and i cancelled my account. I returned my old equipment at XFINITY store at Naperville. After the return i started getting texts that equpiment is not returned and I will be charged. I called call center, spent hours, logged a case but the call center could not resolve the isssue and i kept on getting texts of charges due to no return. I reached on this forum to seek help, i posted from my old account and an agent messaged me and assured me that all is good, your case is closed and you will not be charged. TODAY i got a message and a BILL from XFINITY of charges. to my surprise on this forum there are hundereds of POSTS where customers have complained about XFINITY charging/ sending texts to customers even, they have returned equipment's. As my old account is closed and also i can no more access my account and community messages. XFINITY team Please help me as i am tired of this experience !!!!