yes I sent money to participate in ICO. But now it is over

Just contact the developer team in ICO you participating, just giving them the Tx Id
They will sent back the Bitcoin to you, What ICO you participating?
This is only the best possible solution as of now because we do know btc transactions cant be reversed and theres only one way on where those bitcoins will go but only to the Developer teams wallet of a particular ICO. I think no one could able to help you regarding on this matter but only yourself. Just tell them that they should send it back since the ICO is already over.