Wynncraft Account Linking Problems

My minecraft account is, somehow, linked to a Wynncraft account already despite me never having linked it to a Wynncraft account. The only thing it should be linked to is this forum account. The only reason I'm realising this now is because of the giveaway - I was unable to play for a few months due to tech issues and forgot it was a thing after I came back.

I don't know how to fix this and I don't even know where to look for help fixing it. Anyone able to point me in a direction?