I know how disappointing it's to lose the username and password for an account I’ve played in for several years. But if you want to continue to play LoL, then I can advise you to find League of Legends smurf accounts here https://smurfstore.co/
. In just a couple of minutes you will have a character of level 30 or higher. I know how uninteresting to play at low levels again and again, so I think that buying an account is not such a bad idea.