Can't connect left controller because the menu button isn't working

[u/Sensitive-Singer-374]

Yesterday my left controller got disconnected, happens every once in a while, but I can't reconnect it because a couple of months ago my menu button broke on the left controller, I Don't really know what to do about it, I saw someone fixing it by just letting the controller die then charging it again, but what if that doesn't work? And there's no chance I'm going into the effort of using my warranty, because I bought it from the UK and I live in Norway (It used to be about 6 times more expensive over here than in the UK)

Am I one handed forever? Do I save up for a replacement? Can I open the controller and fix it there somehow?