Both current and former female employees of Walmart are up in arms against the gigantic box store, with more than 500 of them joining together to file sex-discrimination claims with the U.S. Equal Employment Opportunity Commission against the company. The move came after they were told last year they couldn’t bring their cases together as part of a nationwide class-action lawsuit.

The U.S. Supreme Court ruled last year that the women failed to show a common and corporate policy that led to discrimination at Walmart, the largest retailer in the country, as well as Sam’s Club stores, says Bloomberg News. The claims filed with the EEOC are the next attempt to preserve their fight over pay and promotions.

“The fight continues to seek justice for the women employees of Wal-Mart,” two of their lawyers, Joseph M. Sellers and Brad Seligman, said in a statement.

Walmart spokesman Greg Rossiter responded in an interview, saying: “Anyone with a legitimate claim should have their day in court. These claims have never been heard on their merits.”

According to lawyers for the women, there are still “thousands of claims to be filed.” The women who have already joined the case are from Alabama, Arkansas, Georgia, Mississippi and North Carolina, and were under a Jan. 27 deadline in those states to be a part of the filing. Women in other states have until May 25 to add their names to the list.

Group of 500 Female Wal-Mart Workers File U.S. Bias Claims [Bloomberg News]

Want more consumer news? Visit our parent organization, Consumer Reports, for the latest on scams, recalls, and other consumer issues.