Overcharged

I upgraded my contract with cell c in December. The new package was meant to be 399 and my line is kept . I cannot load airtime and I don't even call the call centre for extra benefits. But Cell C never ever debited the amount as per agreement. Amounts varies from month to month and gets high every month.when I call the call centre no one is giving me a straight answer . I have been asking for a detail statement from day one up until today I never received it. I've logged in a complain with them and I hold the the payments up until my query is resolved but I only receive a text saying my complain was received and will be attended within 48 hours and after that I received another text saying my query is resolved.then I received calls from attorney cz my account is handed over. I gave up and made payment arrangements and I was instructed to deposit the amounts on the attorney's account not cell c as cell c handed over my account. I deposited the money to them. Month end cell c debited my account in full plus extra plus I paid their attorney up today no one can give me a clear explanation of what exactly am I paying for. No one is sending me an invoice or my detail billing. Again today an extra amount was taken on my account and the consultant was so unhelpful and impetient. I wish there was a way of cutting ties with cell c as the experience is horrible and this is ****************.