AT&T BUSINESS ACOUNT

I have canceled my AT&T business land lines several times with a zero balance and I am supposed to even get a refund. AT&T IS FRAUDULENTLY drafting funds from my business bank account still. I have canceled this account with a zero balance and have contested the charges, as told to do from an AT&T REP. I HAVE CONVERTED THE LAND LINE NUMBER TO A CELL PHONE TO ENSURE CANCELATION, AS TOLD TO DO SO FROM A REP. I HAVE SPENT 4 MONTHS AND COUNTLESS HRS TO RESOLVE THIS. AT 53 YEARS OLD AND A CUSTOMER FOR DECADES, THIS IS HORRIBLE. I HAD THESE LANDLINES FOR BUSINESS FOR 16 YEARS. WE JUST DIDN'T NEED THEM ANY MORE. 

I'M AT MY WITTS END WITH AT&T.