Domino's Pizza — EGC Not Working

I have 2-EGift cards worth 500Rs each. When I try to use them it says pin is not valid without even taking me to the OTP/PIN entering page.

[protected] this the number of 1 coupon. Let's see if it makes any difference after posting here.

I tried contacting dominos through their email but the customer service there is not even responding.
And the toll free always redirects too automated IVR.

There is no option to contact any person from dominos.

After this experience my interest towards dropped and I'm questioning myself why did I even take those E-Gift cards. Thanks DOMINOS for this experience. Let's see if I ever become a customer to you again. ✌️