Paytm — lakme salon voucher 1999 is not valid

Address:

Bangalore, Karnataka, 560078

I purchased lakme salon voucher on paytm of 1999 of 3. The voucher code when i tried to apply in lakme salon jp nagar 3rd phase bangalore. It is showing not valid code even though validity is there. I tried to contact paytm but there was no response from them. Received a auto messages.
Tried calling paytm customer care. No option was there for voucher purchase.
Paytm is fraud selling such voucher in name of cashback...

My 5997 amt i got 900 cashback who 5000 rs waste of my voucher pack