Repairing an automatic gearbox of a car can really be problematic. While some technicians may claim they can do the job, you may end up in a worse situation. Suggest, you do some legwork and move around Sinaiyah and talk to some of the garages there. Ask them to recommend you the right place. They may be knowing of some that carry a reputation for good work. You can then visit those places to carry out your own inspection of their workplace and decide. Alternatively, if you have some Indian friends especially from Kerala, take their help. They will help you find the right place through their contacts.