Dispute the charge with their credit card company.
You'll get your money back and it will issue a bunch of chargebacks to JustFab, which will penalize them financially. If enough people complain their penalties will escalate and their credit card processing rates will go through the roof. This is how the credit card system weeds out crappy businesses like this.
Unfortunately the very people who this model is designed to exploit are the least likely to know about their consumer protections.