The Revenue Resource Group, LLC filed a lawsuit in Fresno, CA claiming the Kardashians breached their contract when they pulled out of a deal to be the faces of a controversial MasterCard-approved prepaid debit card.

As we previously reported, the K-ladies claimed they quit the deal because they had no idea the card was loaded with hidden, possibly illegal fees … fees that caused the Attorney General of Connecticut to open an investigation into the card.

Revenue Resource Group claims the sisters signed a two-year deal that they should have honored — and since the fam backed out, RRG has been crushed by a wave of bad publicity.

RRG wants the women to fork over more than $75 mil to make things right.

TMZ reports the company behind the Kardashian Kard is looking for some serious compensation for being made to look like the bad guys.