No service for sale cancellation

I bought a Ford Mustang on the 19th of July 2022 from webuycars Germiston. The Dekra Report stated nothing was wrong with the car. I did not even have the car for 2 months when it started giving problems and I was advised by Ford that the engine needs to be replaced. I contacted webuycars who advised me they are not willing to pay for the repairs and will proceed with a sale cancellation. They advised that it will take 15 business days for the cancelation to go through. I took the car back on the 1st of October 2022 as they requested and to date have had no feedback or service from them. The process has not even started and today is already the 24th of October 2022. The bank will take off the 3rd month's installment tomorrow for a car I do not even have anymore because webuycars are not assisting me. I can not explain how disappointing and frustrating this whole situation is as this was my dream car and webuycars has taken that away from me. I am now sitting without transport and without any feedback from webuycars. I would not recommend them to anyone. I do not know what to do and think that my only option now is to consult a lawyer.