Maybe the money they had on Revolut was malicious, so that's why your account was blocked. In this case, they are the scammers. Anyways, only Revolut can tell you why they blocked your account.
Bingo. You need to escalate the issue with Revolut by following their own procedure:
https://www.revolut.com/legal/complaints-policy/Alternatively, you can also send us an email to
formalcomplaints@revolut.com. If you prefer to send your complaint via email, please ensure to include the following details:
Your full name
The phone number linked to your Revolut Account
The email address linked to your Revolut Account
The date when the issue happened
Details of your complaint our proposed resolution for your complaint.
You need to clarify that you are seeking to establish whether the closure of the account was an issue with you as the account holder, or the senders of the funds deposited to your account.
Explain that you need to know if it was due to the latter so you can raise a criminal complaint against the localbitcoins users responsible in the hope that they can be traced by law enforcement and possibly (albeit highly unlikely) recover your bitcoin/funds. In any event you are entitled to more of a response than simply, "we can't tell you", seeing as they literally emptied your account without notifying you.
At the very least they are required to advise you of the procedure you need to follow in order to fully establish the nature of the decisions they took in returning the deposits to the originating accounts. Be that through a formal complaint with them, the financial ombudsman or, indeed,
Action Fraud UK