Info Edge — Refund money

I have taken fast services for recruitment but later they have started asking money many times like medical fees, security amount, background verification fees, etc so I have asked to cancel the services and refund me my amount for which they have provided me invoice too. And they have asked me to pay the GST amount for refund by accounts team. After clearing from my side they are now not responding to me and all of there number is switched off except 2 people Mr Himanshu and Mr Rakesh. Remaining peoples included in this are Mr Roshan Mr Vineet jain Mr Praveen Mr Gautam etc.
Kindly refund me my money and take actions against such offenses.