need help asap

I have bought the R7000 router and i wanted to change the radio bands but the default netgear firmware did not let me specify 2.4ghz to n only and 5ghz to ac only so i went ahead and installed ddwrt k3 and all was good however it was far to advanced for me as i havnt learned about ddwrt so i went to the update section in ddwrt gui and uploaded the latest stock netgear firmware onto it. It said the update was successful and i let it fully finnish before i pressed the reset button to go to factory. Now i cannot access the web gui using www.router login.net or 192.158.1.1 and i cannot even conect to a wifi device as it does not seem to be using DHCP and im unsure of the static ranges to use please help this router is way ro good to throw out