Signal not being detected on c3000 modem

Last July I bought the Netgear c3000 modem for wifi in my house. 2 days ago my internet just stopped working. I called my internet provider and they updated everything that needed updated and resent the signal and the modem is still not connecting. Their advice was replacing the modem. I spent $90 on this and I'll be pretty mad if I have to go and get a new one after only a year. Can someone help me?