Still being debited for a car I dont have

We purchased a bakkie from Speedway motors. Solo Motors arranged the finance for this and was very quick to phone when documents needed to be signed. 2 weeks after taking delivery of the vehicle, we subsequently discovered that the bakkie had been involved in a front smash and written off. Needless to say, we were within our rights, and cancelled the deal, returning the bakkie to Speedway motors and requesting that Solo Motors cancel the finance. This was the middle of March. We received an email from Deon Pretorius, confirming that the finance had indeed been cancelled. I have been debited by MFC for service fees and instalments for a vehicle I do not own or have in my possession. MFC state that there is an amount outstanding and no contact has been made by the dealership to resolve this.There has been no attempt by Solo Motors to contact MFC to have this sorted out once and for all. NEVER EVER purchase a vehicle from these ******!