Sigh.....
four years ago it was probably as simple as someone filling out a counter deposit slip and making a mistake on the account number.
Do I upload my resume and college degree to validate my advice?
No. What you do is give correct and consistent information. Most of the people who answer questions posted on this board have two to four degrees and many years of experience in their field.
This is evidently what you want.
1. You did a great thing by notifying the bank they put $4,000 in your account that wasn't yours.
2. Bad bank. They took back the money when they finally validated where it needed to go and they didn't have the courtesy to let you know they were doing it.
3. Bad bank. They closed your account and told you to get a lawyer if you wanted specific information on why they chose not to continue your doing business with them.
4. You have every right to have spent the last 1,460 days still trying to figure this out. I admire you for your tenacity. Most people would have gotten on with their lives.
There.... feel better?