If you cancel on or after the 6th without clicking "Skip the Month" by the 5th, Fabletics still bills that month's $69.95 membership fee, because billing for the month begins on the 6th and runs through the 12th. That month's VIP Credit stays on your account after you cancel.
You can redeem that VIP Credit for up to 12 months after it's issued. If you have questions about the charge, contact Fabletics Customer Service at 1-844-322-5384, available 24 hours a day, 7 days a week, and the team will review your account with you.