Account gone after account name change

This happened to a nice fella on Reddit who couldn’t post on cc forums. If anyone could help him out I’d owe you one.

Here is his problem:

So I just created an account. the-indrajit-kar. Then decided to change my username to theindrajitkar something that was available. And it was a suitable username too. But don't know what happened that it got closed for abuse right then. I don't have multiple accounts or have played even one game.
So how did I get tagged for abuse even? Please reinstate my account. Maybe the system mistook me for somebody else. My name is probably common in this part of the world and someone that had an account with this username had issues maybe but I found the username free and took it and now am gone just like that. Help me out someone. Contacted chess.com support multiple times, hit them up on Twitter, raised tickets but no responses. Been over 10 days.
I made an account on chess.com for the first time and have bought a Diamond subscription as well but it's like I lost my chance and time to try it out and my money too. Bad experience must say.
Can someone please escalate the issue someone that can maybe. Staff, moderator or anyone that can offer help. Maybe tag someone like Martin, Alex, Victoria or some other moderater on the forum as I cant do that since my account is gone and can someone post this on the forum on behalf of mr
Hope you folks understand and surely will be of help! Cheers, peace out!

Hmm. I couldn't find anything under either name.

I think at some point one has to rely on Support.

He can always dispute the credit card charge with his issuer.

It has been handled. It was not a mistake.

Support won't explain it to a third party.