How many Gigs can a buyer order?

Hello everyone, I have a post up for producing business plans. Each of my plan is technically 14 gigs. I have a sale, however the customer says they can't order more than 2 Gigs, because they said Fiverr won't allow them to. Fiverr also won't allow me to add extras until I get 10 sales.... How can I go around this to make sure I get paid correctly?

Thanks, Mike