The price it's being sold at right now doesn't really matter since you can't trade it yet.

I never invested in IEOs before and never used any of the exchanges you mentioned, so am curious to know if it's possible to withdraw the tokens you bought to an external wallet! If you can, then your best option is to withdraw them to your local wallet and try to sell them for lower price on other platforms (e.g: telegram).
Otherwise, am afraid to say that there is nothing you can do but to wait till the official trading opening date and hope for the best!