Worst client experience with Mondo

I have taken a laptop MTN contract through Mondo in December 2020. The sales consultants name is Donovan who described the laptop incorrectly over the phone. On arrival of the laptop, I realized it was not what I was advised and I called Mondo and was further advised to return the goods at a MTN Direct store and they will process the cancellation which I did the next day. Even the MTN Consultant said that this has happened on many occasions where the rewards sales incorrectly describes their deals. Since then I have been debited every month for a contract and services that I have not used. Mondo only managed to process the cancellation in April and since then I have not been refunded for the total amount that I was debited. Now my current MTN statement reflects an outrageous amount of R7387,60 for the cancellation of the contract that is payable by me which is obviously incorrect as I returned the goods within the 10 day period. The MTN consultant also advised me that I should not be charged a cancellation fee and that only Mondo can assist with the refund process. I called and emailed Mondo numerous times with no helpful information received. I have spoken to Bhavisha many times who was handling the query who suddenly has stopped contacting me with any feedback and many other consultants but to date have still not received a refund. I emailed days ago explaining that I need a resolution and my refund to be completed ASAP and requested confirmation that I will not be further debited however I am still waiting for feedback. Speaking to customer care consultants have not brought me any satisfaction and when I asked to speak to a manager, I was told that the manager will not able to assist me any different. I even emailed requesting a managers contact details and still haven't received it. Surely, a cancellation should not take 4 months to process and a refund cannot possibly take over 2 months. I would not recommend anyone to take contracts with Mondo which is affiliated with the Rewards Co.