Cancellation of contract

I’ve been trying to cancel a data bundle contract with Vodacom as the device was lost ie not using the data at all. I emailed *** on the 2 and 8th Oct 2020 to write and cancel the contract. I received no follow up from Vodacom. Now I find out that I ‘upgraded’ the account in December ! Why would I upgrade the account when the device is lost?! and I am trying to cancel it.? There is a dispute raised now to review the telephone recording of that phone call. Furthermore, in trying to deal with Vodacom issue I get consultant Sandra from cancellations on 5 May suddenly ‘not hearing me’ ie the line and then she hung up on me. I find out that the email address for the account is wrong on the Vodacom system. Which makes sense why I have never received an invoice or any form of communication about confirmation of an upgrade to this account. Then I update the email address again on 5 May with another consultant ref *** who took down the ‘correct’ email address. I receive an sms from Vodacom and see the email address for the account is again wrong. I phone today 6 May to update Vodacom and they take down the correct email address - can’t the consultants take down a correct email address???? so I can finally get communication from them. But overall - what a disaster to cancel a contract! And different consultants tell you there’s no ref number generated for the call or it goes silent on their end. Also I don’t receive an sms or get asked to rate the service of the call /query