Coinbase closed my 5 year old account with £4,500 pending BCH

Hi,

I've been using Coinbase for nearly 5 years with no issues whatsoever; buying BTC, selling BTC, mining BCH, DOGE, LTC. Always received funds, never had a single problem.

Yesterday I received this email:

"Upon careful review, we believe your account has engaged in prohibited use in violation of our Terms of Service and we regret to inform you that we can no longer provide you with access to our service. We respectfully request that you follow the on-screen instructions presented when you sign in to your Coinbase account to send any remaining balance offsite to an external address."

They decided to close my account, which is fine; but I had pending BCH mined worth approximately £4,500 that hadn't arrived yet.

Everything was bought and mined legitimately with my own bank/cards. Why they closed the account is beyond me, probably an automated mistake.

I spoke with my mining pool and explained the situation, but they said it's not their problem since I was mining to an exchange address (which I know I shouldn't have done, but I had done it for years without issues).

Here's what happened technically: Coinbase deactivated my deposit address upon account closure. The BCH payout still went through and is fully confirmed on-chain with 12 confirmations, but the funds went straight into Coinbase's hot wallet because my address was deactivated. The funds don't even show in my account.

The transaction is confirmed on the BCH blockchain. I have the TX hash, the sending address from the mining pool, and the receiving address, all verifiable on any BCH block explorer. This is not a lost transaction. Coinbase has the money.

Mining these blocks cost me thousands of dollars. This is a massive loss. I'm not rich, I took a calculated risk to mine BCH and it paid off. Now Coinbase is holding my payout.

I've already filed multiple support cases and complaints through their site. Their own email says I should be able to withdraw remaining balances. The funds arrived AFTER the closure notice.

What should I do? Has anyone been through this and successfully recovered funds from a closed Coinbase account?

Thanks.