Also got this problem last week.
Best course is to login in you ICO dashboard and chat (in the right lower corner) with the support team.
The guy who will try to help will ask you for some stuff. So, before chatting do this:
Get a printscreen of your deposit(s) in your dashboard (at the bottom of the page) + get your sending addr + get the Tx id of the transaction + the exact amount.
Then start a conversation, explain the problem (then press ENTER) and copy/paste one by one these info. Finaly, drag and drop your printscreen over the chat window. Then wait for someone to reply.
I hope it will help you and everything will go well as it went for me.