Changed LoL Username - doesn't update it in the url

Hey guys, I hope you can help me with this error.

I changed my username form Lucã to LeagueMitLuca because the TrackerGG-Twitch-Bot always had a problem with the “ã” in the url.

But no matter how many times I refresh the bot or unlink and relink my accounts, it still trys to gain access toã instead of

By the way, even itself doensn’t seem to accept that I changed my username. When I click on “my profile” for League of Legends or TFT it takes me to the same 404 site.

I have NO IDEA what to do next, can somebody please help me? ._.