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I have the same experience too and one member told me he's steem is on hold for the last four weeks. So I decided to move. Here how I moved my STEEM from Poloniex to Steemit.
https://steemit.com/steemit/@yehey/moving-from-poloniex-to-bittrex-exchange-to-my-steemit

I hope that help you.
Follow me @Yehey

Thank you.

Thanks. I'm done with them. They still haven't even replied to me after 18 days.

I'm already done with them. I successfully moved out everything, transferred them to my steemit account.

Check my other posts. Vote Up @yehey
Thank you.

Yeah many people are pulling the plug on Polo and Coinbase. I've done that many months ago.