Indian Railway Catering & Tourism Corporation [IRCTC] — I need to know some clarification

Address:	601204
Website:	www.irctc. com

As chennai received heavy rainfall, our house surrounded by flood, i have booked 2 tickets from chennai egmore to thiruvarur on 05/12/2015, in karaikal express. I have cancelled the train ticket on 03/12/2015. Because i cannot travel, since my house is flooded, after that i heard the news that train was cancelled, what refund amount i will get? First it was stated 180 rs as refund amount . But now train was cancelled. So would i get full refund or rs 180 . I need the answer as soon as possible.my pnr no is [protected]