Avatar locked - can´t change Avatar. The Video uploaded does not show ingame, only loading the game. Yet ingame it´s the same.

I used an Avatar, then bought Squee and applied after transaction as standard. since then my avatar is locked and whichever i choose it´s always the same avatar ingame.
Support couldn´t help - reinstalled the game - uninstalled with revo intensive mode, disabled windows coreisolation - i am not using third party AV or vpn.
thanks

EDIT while participating in the sealed-dominaria event (12.000 coins) the avatar is not locked.

on traditional historic play it is still locked :(

EDIT
The Avatar was never "locked". In Deck Options (clicking top right corner on the deck symbol) you can select a specific avatar for each deck.
Yet i am surprised that support couldt not give this info.
problem solved!