MTN and Mondo month to month data contract - challenges with cancellation

Regarding MTN month to month data contract taken out via Mondo (MTN's online sales partner) .... I was recently informed that the process to cancel a month to month contract is as follows: customer has to return the physical device to an MTN direct store with the original delivery receipt (otherwise they won't process the return - why is this necessary and not explained upfront?). Customer then has to communicate a reference number to the Mondo cancellations dept. The device has to make its way to a warehouse for inspection (which can take up to 7 days) before confirmation is received .... only then does a 21day cancellation process begin. I returned my device at the JHB store on the 22 June... I received confirmation on the 3rd July that the device was received at the warehouse. It is now a full month later, Mondo claims they have not received confirmation from the warehouse and can therefore not cancel my contract. In the meantime, the monthly debit orders continue for a service I can no longer access. These are all internal processes between MTN and Mondo and they have no incentive to expedite the process. This is a huge inconvenience with numerous phone calls made to the customer line. Time and money wasted and still not resolved.