GoAir — Flight Cancelled by Airline

My flight was cancelled by airline and ensured that my ticket fare is protected under go air credit shell, but when I was trying to book for another trip but I Was unable to retrieve my protected fare.
I was travelling from Ranchi to Ahmedabad and it was a connecting flight from Ranchi to Delhi and Delhi to Ahmedabad. Then Delhi to Ahmedabad flight got cancelled by airline.
As flight was cancelled by airline and not by me so I need my full refund. This is also very rude that no one responding to mails.
PNR No.- I26D3L