TheaterMania.com Customer Service Issues

Last night, I came across the A Christmas Carol offer of 40% off and decided to check it out. I picked one ticket, proceeded to checkout, and noticed it was still $50 plus additional fees, assuming it included the discount, more than I usually spend on online events. After spotting the code SCROOGE, I went back, entered it, and without verifying the discounted price, impulsively finalized the purchase while feeling tired. To my dismay, the total remained $50 plus fees. When I revisited and realized I hadn't clicked APPLY, on the second attempt, the 40% deduction reflected correctly (I didn't proceed with this transaction). I seek resolution to pay the discounted 40% price, as I wouldn't have made the purchase otherwise. Even though I contacted AmEx, they can't assist until the charge posts, leaving me reliant on your support. Kindly reimburse the disparity to my AmEx if eligible for the discount. My confirmation code is MCIV5GD. Thank you, Eileen McInerney.