Invoice for R729 account debited for R878

I never check my invoices from Telkom Mobile as I assume a company of their status would have their admin in order.<br> <br> For the first time I checked my invoice after I was notified my account is being debited with R878.00.<br> <br> I always keep track of my cellphone account and knew this was incorrect.<br> <br> I checked the invoice which is for R729.00. I am the phone the now, and the lady I'm speaking with says it was for December's billing. This annoys me, as I HAVE JUST EXPLAINED I was debited for January, incorrect amount.<br> <br> She then re-iterates it is for December. I direct her to my January statement / invoice. She now sees the difference and says the system advises her I have to be credited R99. <br> <br> I say no, can't your system count? It is a difference of R149!!!! I mean what the hell is their system smoking? <br> <br> I asked for a manager, I am waiting in excess of 10 minutes to speak to a manager. <br> <br> I want to cancel this contract as it is a breach on our agreement. I wonder if the same is on my other statements as well?<br> <br> NOW I HAVE TO CHECK every **** statement I have received, I HAVE TO WAIT on the phone to sort this out??!!?