Cyankart — Helpline number

Address:	New Delhi, Delhi
Website:	cyankart.com

I had ordered a phone case for samsung galaxy s7 . Today I received the package and the phone case is faulty. It's popping out of the phone.
I tried to call on the helpline number to return the product but the call is getting disconnected everytime. How am i return the faulty product now?
Moreover, how can you send a faulty product. It doesn't even fit properly on the phone.
Provide me a proper contact number so that i can talk to one of your representatives.