Complaint Review: discount poster sale

I was helping my mother who is 82 years old with her grandchildren's Christmas list shopping which included posters of snow skiing and World War II aircraft.  We found the poster web site but her card is associated with a PO Box and they would not deliver.  The credit card address and delivery address had to match.   Then we called them and placed the order by phone so it should have been recorded.  I, as her daughter, used my credit card to place the order because there was no other way.  I don't remember if the shipping was free.  It was holiday time and most sites were.  There was nothing about a membership program mentioned.  I would not have placed an order.  I have been charged $9.95 a month on my card since.  I could not figure it out what was going on.  I have never received any e-mails or promotions, anything you would associate with being a "member."  I paid probably over $100 for $35 worth of posters.  A terrible rip off as a single Mom and in this economy.  Shut them down!