Hope somebody can help.

I lost dial tone on my landline( it happens a few times a year) this was fixed on Monday. When it was off internet is very slow and normally goes back to normal when fixed. 

This time it stayed slow. I phoned EE and was talked through trying to fix it with no success. I was told to try a reset and he would call me back. I did the reset put my password back and now it won't connect at all. The guy rung back and has washed his hands off it as it's a third party router. They are sending me a router in 3 to 5 working days plus Xmas! Which I don't want 

Now it was connecting fine before the reset and I set it up when I originally bought it. 

Any settings I can check/change before my head explodes!

Thanks