UNPROFESSIONAL AND PATHETIC CUSTOMER SERVICE

Wrong bill. I have a contract with Telkom they debit R99.00 per month but on the 2nd of July they suspended my line they sad am owing R702.00 for what?? I tried to call customer service even though their service is very poor their consulted their explaining different stories. What I need is my line to be activated because am not owing them rather than to bill me wrong and suspend n line without noticing me why??