Poor Call centre Agents and poor billing

The call centre agent loaded a debit order on my account, even though I asked them to only do it for the box office account, which is one account i found out a month later. I then reversed the account and paid manually, they then cut off my services 4 times and each time I spent more then R40 on airtime to phone them.On each instance that i called the call agents ensured me that i owe nothing and that my account is in credit. Just to find out i actually need to pay an additional R67.00. So for the bouquet that im on which is, R199 i paid about R120 in rtime and must still pay R67. Whats the purpose of the call centre agents of they can adsist you. I spoke to the manager and he got an attitude with me when i expressed my frustration with their poor performance. Apologies don't pay the amounts in i do.