Has anyone else ever sent their Ethereum to wrong wallet by mistake?

I did that in December and since then i have opened tonnes of tickets which go unanswered. (Well one was answered with empty promises )

About 3 weeks ago they asked me for txn which i sent. Support member said he would escalate my case to urgently to help me recover my 300$ Ethereum sent to a EBTC wallet instead of the Ether wallet address in their exchange.

one month now the ticket that was escalated to urgent has not been solved. I wonder how long it takes a non urgent tickets.