My advise to you sis and bro here ...

1. Its best to sent your car to your own trusted repair shop and claim the repair money... You should not have left your car to an untrustworthy people like them ... ?? They will definetely screw it more... Use the tribunal to claim your money... Much easier then asking them to repair it .... At least you have a car to use...

2. Its best to have a trusted repairman phone at hand .... Some may even come on site to help you out ... Pay a little extra but hey its worth it.... Most car breakdown can be repair on site...Not permanently but at least you car drive it to the trusted car shop...

3. Always check your timing belt at intervals... Better safe then sorry right...