Spirit Airlines $69.95 charge after using them a year prior. Miramar Florida

I flew with Spirit in 2017. 8 months later, I get a $69.95 charge from a "Spirit Visa." I don't even have a card through them, and I definitely didn't authorize the charge. If you fly with them: Be warned and ask about any sort of fees, because they have tons of hidden fees. I talked to a customer service person who said she'd refund the money, but we'll see. It's a holiday weekend, so it might take awhile to get back into our account. It's inconvenient and underhanded to charge for something 8 months after a flight when we didn't sign up for anything at all.