GOzD I think you are entering the memo.id
as the address. You need to click a little show address link to see the Poloniex deposit address. The address starts with a G And is a super long text. Something like:
In this case GCG... is the address. But all deposits have the same address and you need to enter the memo.id
to differentiate yourself from other people depositing (it is written where I put the blue rectangle).
My android lobstr wallet only offers me a message field and I don't think this is the memo.id (maybe memo.text?). I would first create an account at:
https://www.stellar.org/account-viewer/
Send everything there and then send everything from there with the right memo type (memo.id) to Poloniex.