8ta Contract Expired yet Telkom still debit my acc

I had a contract with 8ta which I just learnt it deals with Telkom. They used to debit my account and they stopped in February 2015 which I believed my contract with them ended because I didn't want to renew it.<br> Following that in May or June if correct I received a call from a company called Nudebt saying I owe Telkom a R180 and threatened me to blacklist me if I don't pay. i paid R180 not even knowing what was it for because they failed to explain to me. The next thing I this company *****s money from my account every month on the other hand Telkom is also *****ing my money.<br> When I inquire about this whole drama, Telkom told me I should have gone into the nearest Telkom store to cancel the contract, alternatively I should have downloaded a cancellation form from their website to cancel the contract. My problem is no one has ever explained this ******* to me which is why I feel Telkom is full of more than other mobile companies. They are so pathetic.