Accidentally clicked "accept your offer" in a acceptance letter?

Just like the title says, I got a letter from a college saying that they accepted me. Being the dummy I am I clicked “accept your offer” and it brought me to a website where it shows all my college information. It even says in a box “Future Due - 350 Fall 2017” and make a payment. Does that mean I wont be 100% accepted unless I make that deposit? Is it too late since I still have other colleges i’m waiting to get a reply from.

Also since its Christmas Break I can’t really call them until Jan 3rd.

You are accepted. You have not accepted their offer until you make a deposit payment.

You can just contact them on Jan 3 and tell them you accidentally clicked accept when in fact you haven’t made up your mind. No sweat, it won’t be a problem. They can tell you what to do if anything is needed.