incorrect billing and breach of contract

cell c has been incorrectly billing my account consecutively for the past 6 months. They have been in complete breach of contract and have put me under such financial strain as well as set me on a path of a bad credit rating. The only time they will respond to a customer is under such conditions when you put them on Hello Peter or on twitter. Their turn around time is appalling, as well as the fact that while they are trying to sort themselves out or \investigate"the query you are incurring all the charges especially bank charges which they never refund. <br> <br> I am on a top up R99 package but since April have not been paying this amount"