Telkom inefficient

I canceled a wifi contract on 5 July as my contract would expire in August in September bill is not changed. I phone to enquire as I have canceled to be told they see no record that contract is canceled where's on my phone I see I called telkom on 5 July @4.39 call almost lasted 15 minutes. Cancelation said in order for me to reverse the charges I need the recording which on their system Nokuthula who I just spoke with says there's no record while on my phone the is record they don't have the record on 5 July so they can listen to the conversation isn't this pathetic. I can't be paying for services i canceled please help me resolve the matter.