CONSTENT INCORRECT INVOICES

Good day ,<br> Today i received my invoice due end of 31/03/2016 with the amount due of R4689.50 , which is impossible and rediculous , they charge me me for airtime transfer donations , once off voice bundles and once off internet bundles , where do they get this **** ??? This is not part of my contract infact my limit on my contract is R650.00 so how the hell do they come to this amount!!! This is not the 1st time its happening , it happend once or twice before as well.... This is really starting to aggravate me , its such a mission to sort this **** out because Telkom is one of the worst services that you can get in your whole life....This is not my only complaint... 3-4 weeks ago i cancelled a 3GB Data promo on my contract which they still havent cancelled , you can ask for confirmations till you turn blue , you get absolutely no feedback from this **** place....I mean they charge me for a sim card that i havent used for +-2months as the phone that had this sim card in got ****** , and i told them to cancel this contract asap....but you still dont get any replys..... I want this sorted out!!! , i will never ever recommend Telkom to anyone.