Cancellation of Telkom contract.

I've been trying to cancel my contract since 11May 2018, to be cancelled 11 June 2018 as you need to give them a month's notice. The reson for cancellation was that I could not use my internet fo up to a month, when you phone, everybody had a different story. When I phoned at the end of JUne I was told the contract was cancelled and that I will only receive an account up untill 11 June. Yesterday I received an account again from them, When I phoned I was told that the contract is still active. You cannot go into a Telkom store to speak to an agent, it needs to be done telephonically. I already have 15 call log numbers for the cancellation and the internet not working. I realy don't know what else to do to get the cancellation through.