I had this exact issue. I specially chose the more expensive monthly options and read all the fine print, but apparently the cancellation fee snuck by somehow. My solution was removing my credit card, adding a “you don’t deserve to get paid” prepaid VISA charged with ¥200, and canceling anyway. They tried to charge me on and off for about a month — and a random charge attempt 3 months later.

Having to do this is a terrible felling and I feel like a bad person, but I at least put the cancellation fee I would have paid to good use by buying Affinity Designer.