TELKOM *****ING MY MONEY!!!!!!!

Telkom keeps deducting money from me, when TELKOM OWES ME MONEY!!!! I have had this fight since February and they paid me R630 this month, saying I will get the other R630 next month, now they are deducting money again saying I owe them. WHAT TYPE OF SERVICE IS THIS?????????? YOU OWE THE CLIENT MONEY BUT YOU KEEP TAKING MONEY FROM THE CLIENT????? I WANT MY MONEY BACK AND I WANT THIS ACCOUNT SORTED OUT FOR ONCE AND FOR ALL - I'm at the point where I will rather move to another service provider because since I upgraded they have just been taking money as they please!!!!!!!