There may be a way to get out of this by switching to another plan and availing of the 2 week grace cancellation period.

https://responsivedesign.is/articles/cancel-adobe-without-pa...

Happened to my daughter she needed InDesign in order to do a once off college project. She missed the small print and signed up to an annual sub (€300 total). She managed to get out of it using the method described above.