Cant change the Microsoft account at the Ps4

So i Have a Littel bit of an Problem,

So i trayed to Connect a new Microsoft account to my Minecraft on the PS4 but every time i try to Connect it says:

Oops! Looks like this account is already connected.

Please sign in with your previously connected Microsoft Account, Fisch412

(The picture i send is german!)

I trayed to Delete the game but i have the same issue every time and i have no idea how i can contact The ps 4 support i never found an E-mail.

i have no idea what i can do right now