I had the same thing happen to me. I had a charge on my statement from TLG Great Fun, called the bank and found out another charge had just been posted. Both charges were 11.99.
I called 1-800-242-7771 (the bank gave me this phone number) and was told I had signed up through Priceline, where I bought tickets a couple of months ago.
I told them to cancel my account and reverse the 2 charges. They agreed and said it will take 7-15 days, so I will wait and see now.
Be aware when using Priceline and for people who are in the same situation, ask for your money back from TLG Great Fun....not so fun!