Maruti Driving School — Delay in DL

I had applied for DL in Driving school branch of sudamnagar they have applied for LL but they didn't apply for DL and my LL got expired because of them (I had called them n number of times even then they didn't do anything). Later they said that the driving school is merged with some other driving school. So I had asked them for refund the employees Ram and Pradeep (accountant) has told me that they have resigned the job and had given me other persons contact number named Santosh. But the refund amount which I have got from santosh is only 1350, I had paid 2500 for applying for license in this school. Even after showing all proof of payment Mr Pradeep is not responding the call and Mr Santosh is telling me to contact Pradeep. These people have eaten my money. Neither of them are giving the owner contact number of maruthi driving school.