Invitation

I purchased a discounted packet of 110 invitations through groupon from Zazzle. I then went to their site to order, staying within the boundaries of style, type, ink ect. I only purchased 75 invitations fully knowing i could order up to 110. Zazzle gave me additional charges which made me spend 94.00 as opposed to the 44.75 that should covered up to 110 invitations.
I was told by the company that I got charged because the quantity was 75 instead of 110. Last time I checked, that would mean they made money as I ordered less. So now I paid twice as much for less product? They said yes and they would not do anything thing else, case closed.
FRAUD IN THE CLEAREST INSTANCE
I will never do business with them again ever, the more or less stole money off of me. No where in the fine print does it say you have to order the exact number or you will get additional charges. Pissed