I have the same problem, I guess they can not answer because they are too busy. But if large companies are acting like that, they can lose customers.
If I got the op, he said he lost access to his Poloniex registered email, which means he lost the password to that email. I think what he should do is try to login to the email and click on “forgot password” to change his password. If not possible, then keep on waiting for their reply and send tickets once daily like suggested by someone here.