Bad service from we buy cars (jhb south Branch)

We bought a bakkie on the 16/05/2026 at we buy cars jhb south branch .The car was rating ready and Derka report was not showing any damages or any mechenical issues .On Monday when we took the car to drive from jhb to northern Cape the car started to loose power about 20ks from the garage and we called them and they sent their towing service to go and get the bakkie ,after an hour the car did the same thing and they towed the car to the garage .Now the we buy cars is refusing to pay the workshop for repairs ,we are being taken from Pilar to post .and this whole thing is costing our business and our client service