Again, you only know half side of the story.
Post the rest of the story, else we can only go by what you and OP have said. And if what you're doing is selling a Twitter account, how hard is it to release one while on vacation. This isn't like shipping something you sold on eBay.
In addition, I pointed out to you that he WAS here looking to settle this, and you disappeared. You do not sound like a responsible individual who's interested in conducting business properly. As I told you via PM, if OP here contacts me directly or posts here that this matter has been settled, I'll remove the red trust. You'll still have a neutral, however.
I have nnn of accounts and it is not easy go through spreadsheets and find out the ones that meet OPs criteria on that budget. Also, I use password manager and OP know these things. It is not easy to do that on a vacation without laptop. Also, think about someone abusing you and your family on a christmas vacation? I'm definitely not interested in nitpicking and I'm still here to settle this in a healthy way.
I have been responsible and in a good relationship with every customer except two. I can see some pattern of these bad customers and will avoid similar like them in future. I have even offered a compensation to settle this in healthy way and avoid mess, but he was interested in negotiating the compensation rather than settling the initial part.
Let's stick with dispute resolution and settle the matter.