need supervisor

Hi I am in need of resolving my account. I have been with your company many years. I can not find help at the store in Pooler,Savannah,Georgia. I had an issue in August last year. I went there and they resolved the issue. To find out that they have confused a person with my same address but different name. No one on the phone can help I cant sign on either for cell or internet accounts. 

I made a payment this month on March 12, and it posted to that old account with my same address. I called and a ticket was made and I was told because that other account is in collections I can no received a credit to my real account. I have reached a point where I am going to escalate this issue and go viral if possible. I also would hat to go to ATT.