eBay's help page explains that if your eBay account has been closed, restricted or suspended they'll send you an email explaining why it was closed and also explain what you need to do before it can be reinstated. If you need further assistance with reactivating your eBay account, I would suggest you reach out to eBay's Customer Service team.
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .