Welcome to the Community @Lindaw20.
When you advised that you are suddenly disconnected, do you mean that your devices were disconnected from the WiFi network?
You've also advised that the 4G and internet light were off when this issue happens, have you tried to relocate the modem/router near a window?
Aside from rebooting it, have you tried to reset the modem/router?
Even though I did not receive any calls from your tech team, but the problem seems to have been fixed now, since last night I have not had anymore connection issues, everything is working fine now so thanks again!