Sim plan contract

I have a contract with vodacom and my last debit is supposed to be this month, I called their contact centre on the 3rd of April to request for a confirmation that the contract has ended she said they do not provide anything in writing. I then asked Thuli (the agent) for a reference for our call, she said it will automatically come through at the end of our call. Till this day I haven’t had anything in black and white as confirmation that the contract has ended. When I signed up for the contract the bill was R122 and it has gone up to R130 with no communication whatsoever and they do not send any monthly statements.