Account closure

I have been battling to close my vodacom account since January after the was a ***** on my account.they said i must wait till April to close it.we are in June now still no help from vodacom.what they are good in is adding more stress by phoning that my account is in areas for subscriptions i do not know about.i have been paying money that i don't why im paying for as the contract was a R99 contract but my last payment i had to pay R250 now they say I owe R358 .how did we get to thi amount.I was advised the account will be written off but that is not the case.