MetroFibre Networx

In our complex we use Metrofibre Networx as our ISP. Most of us were connected to the internet around February 2022. Everything went well until June 2022 when I needed to update my router admin password and also to update my Wi-Fi password (2.4 GHz and the guest and the 5 GHz and guest), I couldn't get access on either. Even thou i had internet. I couldn't get into the router and update them. I was advice to reset my router and then put in a more complex passwords for the admin router and WIFI. I did but then days later i still didn't have access as admin, somehow my admin password was being reset. Even thou I have access to the internet i couldn't get thru to the admin to manage my ssid (network WIFI). No matter how complex i do my admin password somehow I get logged out even thou i have access to the internet thru the WIFI. I have used different approaches to secure my passwords. The second problem is that the router itself also around June 2022 started to broadcast another WIFI network that was not in the list of networks ((2.4 GHz and the guest and the 5 GHz and guest)) and I couldn't manage and I couldn't understand where is that WIFI network coming from. I phoned MetroFibre Networx and logged a calls so many times and i was told the router might be faulty and as to why if its faulty its not replaced and as to why my router is broadcasting another network its still a puzzle for me.