Webuycars refund

I have returned a vehicle and WBC paid back my deposit. I am being hold on a line to also refund my costs that I had incurred for this vehicle. I paid the installment and insurance, maintenance plan for 6 months, with them playing for time on the breakdown. I want the refund asap, and not excuses and "you have to be patience ", for 2 weeks now? The vehicle was returned due to them failing to repair the engine.