C6300 only loads google sites or social media

Comcast interupted my service. Who knew they wanted paid every single month...  After full payment was made, cable back on, internet back on, I can only load google sites or socail media sites on all and any devices. All same results. I cannot log into the router any longer. This router worked flawlessly prior to yesterday when they shut off service. All lights are lit wi fi network indicator blinking.