att uverse brevard county at&t, Uverse billed me after service was over, claimed their old equipment was not turned in turned turned over to collections Internet

After years of paying my bill on time I cancelled my Uverse services.  Uverse/ At&T sent me a 0 balance bill, they never sent me another bill then I suddenly started getting calls from various collection agencies stating that I was in collections due to At&T Uverse over some old equipment. The equipment was garbage and I had turned it in already. They only take calls from NEW customers and there is no way to get them on the phone to fix this. I sent them several letters they ignore them HOw dare they try to ruin my credit after many years of paying my bill on time every month for many many years!! JS Brevard