Can't change name setting up Payout profile

I’ve tried changing my name in the payout profile since I entered the wrong name. I am unable to do so. What can I do so I can fill in the correct name? I’m wondering why name typing is blocked in the first place.

My request tickets have been “solved” without even getting a response. Please let me know if I am just being an idiot or if there is a way for me to edit my name!

Thank you.