My neighbour left her car in with main dealer as it had a slight tremour in engine. Garage kept car for 2.5 months and carried out some repairs and fitted new timing chain at manufacturers expense despite car out of warranty for 3 years. She collected car and paid bill c.2500Euro On her way home from garage car still had tremour and she placed stop on cheque. Garage say they dont know exact problem but need to investigate further but cant give estimated costs. The garage now are going to sue her.What can she do?