Hopeless cancellations department

I contacted cancellations for premature cancellations on my one contract which cost R30 per month. The paperwork was sent to me, which I filled in, signed and sent back to email address supp**** with proof of payment, copy of ID. I've been fighting to have it cancelled for more than a month now, and on each occasion I get told it will be escalated to the back office to sort out. Nobody phones, SMS or anything else until I phone in again and get the same story. This morning I was told that I'm outstanding R1040 cause my contract end 4 month 2021 and I tried to explain without getting through to the lady I was talking to that R1040 divided by R30 a month means I'm still owing 33 months of a 24 month contract which ends next year April. I'm sick and tired of vodacom cancellations department that has no idea what they doing, nothing you explain sinks in, and all you hear is back office which I don't think even exist. I recently had them upgrade a contract, waited more than 2 weeks for it to arrive and when I phoned in, the guy had put it on the system, but didn't process it. Please take your people for training, they obviously lack it. Number in question ***