My experience with locked up pending charges is the worse with C1ti cards. I know the charges won't post since I have no order number nor confirmation email of the transaction, calling GCM is the last thing I'll do. With Cit card, I just have to wait till pending charges fall off, most often it took several days. A rep has said it may take up to 30 days for pending charges to fall off so all I can do it be patient