Netgear N300 & Reliance Broadband !!

Hello friends,

After several months of severe Fiber Cut,I recently got back my Line working very fine.But the WiFi ROuter connection started behaving Bad,,It doesn't connecting!!

I couldn't configure it properly.. Is there anybody whose Using Reliance and Netgear N 150 or N300 Routers ,,

Any Suggestions to work it fine?!! !

Regards & Thanks in advance!!