If the repair shop caused the other problems, such as by performing the repairs in a negligent (or careless) fashion, or accidently damaging other parts of your car while working on the repair, then the would be seem to be liable, or financially responsible, for the damage and the costs to set everything right. A repair person or business is liable when they carelessly cause damage to property they are working on. However, if they will not pay voluntarily, you'd have to sue them to force them to pay; depending on the cost to repair everything, it may not be cost-effective to do sue, however.