Physically, somebody at the destination warehouse taped your pallets after unstuffing and got a bigger number. That is not automatically a lie: a packing list is cartons times dimensions, a warehouse measures the outer profile, bulge and overhang included. Nor is it automatically an invoice. Ask in writing for the tally sheet the warehouse wrote that day, the rate applied to the difference, and a picture of your pallets with the tape on them. Until those arrive it is a claim, not a charge; leave it unpaid and unrefused.
