Cell c lies to customers

Cell c **** to me abt my contract they said they are going to debit the 15th of every month they lying and *****ing R70 extra every month im going to take this further and going to stop the contract i have had a telkom sim for years nw so i needed a new one now i got one for free my cell c sim card packed up and now they want me to pay 100 and something rand for a new one but i have a contract with them they are pathetic