FPL Hyundai — wrong commitments on payment process

Address:

Fpl vanagaram hyundai service centre

Before giving my vehicle for service in vanagaram fpl service centre, i ask them whether i can pay amount through payment link provide by them, they agree for that but after doing all services they demanding payment through cash or card, and they telling no such payment through link accepted, and they not giving the vehicle back.

And no response from their end.