Maruti Suzuki / Swift VDi — REFUSAL OF WARRANTY

I HAVE BOUGHT SWIFT VDI ON FEB 29 2008 .BUT DURING RECENT RAINS IN DELHI MY CAR STOPPED WORKING AND I SENT MY CAR TO COMPANY .AFTER 15 DAYS COMPANY IS DEMANDING 30000RS FOR REPAIR OF SELF START WHICH IS INCLUDED IN WARRANTY .THEY ARE NOT GIVING ME WARRANTY AND ARE SAYING THAT IT IS NOT THEIR FAULT .BUT COMPANY HAS NOT MENTIONED ANY GUIDLINE FOR NOT TO DRIVE CAR DURING RAINS SO IT SHOULD BE REPLACED IN WARRANTY .PLEASE HELP ME SIR.MY CAR NO IS DL9CQS5256 AND IT IS CURRENTLY WITH COMPETENT AUTOMOBILES GAZIPUR