OnAir - ********** transactions

We have been paying off on an upgrade for more than 24 months; we have been unable to get this contract "cancelled", the most recent payment came off on 30/5/2020 for R155. A while back a consultant phoned and offered to upgrade us even further - we rejected the offer. Then on 24/6/2020 we get an sms saying we are "overdue" with R298 and further action will be taken. I made contact with OnAir via email and I was promised feedback. Then a consultant phones my husband on 25/6 and says they want to upgrade us ... 1) even tho we declined the upgrade a few weeks back, it seems the consultant still put it through as accepted ... ********** transaction/consumer protection act? 2) they are unable to give us feedback regarding the money that is still coming off our account monthly ... *****? 3) In order to cover themselves, they phone us after sending us a demand sms - wanting to upgrade us so that they can link and upgrade to the demand of charges ... something is very wrong here 4) we are still waiting for all the requested recordings/contracts to verify the money they are demanding now AND still taking off our account.