Contract

I sent a cancellation form to Telkom mobile to end my contract on the 28th August 2017 and they say it will take 21 working days,on the 27th September i called them for confirmation but they said i must forward the cancellation email to them so that they will do immediate cancellation,on the 28th i called again still they did not cancel it and they said i must forward the email to them for immediate cancellation, on the 29th i called again same thing apply.on the 1st of October i received a package and i called them for explanation they said i must forward the email again for immediate cancellation and must not use the package cause they will reverse it,now i can't use internet because i can't load may data i have to wait for this reversal.on the 2nd and 3rd i called cause now i can't use my phone for internet because of this contract,they said the same thing that i must forward cancellation email and they will do immediate cancellation. I received an invoice that they will debit my money but i do not understand in what ground cause i cancelled the contract and they said i must not use the package.I am not happy with Telkom at all their service it not write and there is no communication between them.