In my opinion, poloniex is one big fraud. Why? I already explain.
I have a polonax account for 3 years there was never a problem sometimes delays in payments or withdrawals, but what happened to me was a catastrophe.
I would like to emphasize that my account is verified with a personal ID !!.
A week ago, my 2fa went down and I decided to remove it using the Poloniex Support. A simple thing, create a query and wait patiently.
To my surprise, after the first ticket, it was closed after 40 minutes so I decided to write why then again it was closed without an answer.
After one week and after 20 tickets, I did not receive a response and the funds on my account are frozen without the possibility of logging in by a faulty 2fa.
Of course I have 16 digital conds to install google authenticator on another phone but it does not help.
And so I was robbed of the savings that I accumulated for 5 years. So tomorrow I go to the lawyer and to solve the problem. I will inform you about the progress on a regular basis.
Below I put the screenshot as evidence of idiotic behavior of help poloniex.
First of all, are you sure that you're not entering the 2FA code from the wrong site or for the wrong account on Poloniex from google authenticator?
But regardless of that, the way that they treated the problem seems to be extremely unprofessional. I have no idea why they closed the support ticket which you opened without actually resolving any issues. Poloniex has demonstrated their growing untrustworthiness in the past few years and I've stopped using them personally due to all of the problems their customers are constantly reporting, as well as an unresponsive support.
BTW, are your account funds actually frozen or is it simply that you can't get into your account? If the latter, I'd try to communicate with support and try your luck with asking whether you can be verified with ID (since your account is verified) to reset your 2FA to gain access to your funds. You could go the lawyer route, but I really doubt it's going to be worth it if the amount you've got on Polo is not that big. But anyways, don't store funds on exchanges. And that's for any exchange, not just for polo.