Just a few week earlier i had purchased a new WiFi router from flipkart.com. The model number of this WiFi router is D-Link DSL-2750U Wireless N ADSL2 4-Port. Actually the problem is this few days back due to heavy rain but now it has been quite a week after this incident and now sometime the link comes and then the link goes. I don't know what should i do or what should i not.

Please help.