Can't access my router/Can't reset admin credentials.

[Mapleaf]

1. Link to the topic you were referred from: None
2. Router Model: XR500
3. Router Firmware: V2.3.2.134
4. Internet Provider Modem/Router Model: Cox Panoramic Wifi Gateway CGM4140COM
5. Do you have internet through the router? Yes
6. Can you access the router interface? No
7. Can you see the router WiFi appear in your devices WiFi list? Yes
8. Any other information you think may be helpful e.g. when it occurred, any changes in your setup etc
   I am trying to access my router through routerlogin.net and when prompted to login with the username/password I am told my credentials are wrong. I then get to the page to reset my password which asks for the serial number of my router but when prompted to answer the two security questions it tells me that my answer is not valid. I know for a fact what my answers are because I have taken a picture of it and I have not changed any information since then (this was years ago).

[Netduma Fraser]

Hold the factory reset button in the back of the router for 30 seconds, release, wait 4 minutes then access with the default credentials if necessary admin / password

[Mapleaf]

Thanks!