Terrible experience with Barloworld Ford PMB

Terrible experience with Barloworld Ford PMB So October my Ford Fiesta 1.0 started showing a spanner light and losing power. Took it to the dealership and they told me rats ate my wires and it would cost me R30 000 to repair that. Searched for the bitten wires didn't find any. Took it back to the dealership they told me its nothing, they reset the light and told me the car is fixed, as I drove home the light came back on. I've been driving back n forth there only for them to reset the light. Now they have the vehicle and they say the vehicle has no fault. Their advice is to let them test the car everyday until a fault comes up. So what do I do in the meantime? Pay an installment for a car im not using? Ford is such a terrible dealership. I would NEVER recommend anyone sane to buy a vehicle at ford, its a waste of money and a load of heartache.