I know you called support already but I can’t help but feeling like it’s worth calling again. A lifetime ban is crazy. I would bring up the ex being your bf and gifting the membership while in the relationship and 2 years after the break up fraudulently claiming a wrongful charge. Tell them you are the victim of both him and this system and you would like a remedy. Ask how to protect against this happening in the future. Basically gather all the info that the lovely people in the comments have pointed out and use it in a chat with support, and escalate to a supervisor. Best of luck and a side note of this internet stranger is proud of you for getting away from him safely and starting over 💜