NEW YORK (AP) — A group of retailers and trade groups has launched a last-ditch effort to stop a settlement worth at least $6 billion that Visa Inc., MasterCard Inc. and major banks have agreed to pay retailers for alleged fee fixing.

Ten out of the 19 retailers and trade groups that are plaintiffs in the class-action lawsuit against the credit card companies say they’re trying to block the deal because they believe it would allow the credit card industry to continue to take advantage of merchants and their customers while stopping competition.