[Resolved]  Indigo Airlines — Refund

Bought an ticket for Chennai to Mumbai for 3 passengers booking reference ANZZJZ, then I cancelled it was advised to keep it in credit shell which can be used to buy new tickets so I wanted to purchase chennai to dubai but then at the time of payment wasn't allowed to use credit shell as destination is out of India so I was forced to pay full ticket to Dubai reference number GK6BFF, now they are saying Credit shell in non refundable and valid for one year I have explained to them I not an resident of India I am back to country where I reside and won't be back within an year but still have no effect on them. please help.