[subscription] investigate user cancellation

[JanKoehnlein]

Bug description

Some users report they cancelled but are still charged. Investigate whether that's possible.

Steps to reproduce

See above

Expected behavior

No response

Example repository

No response

Anything else?

No response

[gtsiolis]

Cross-posting relevant discussion (internal) (cc @jankeromnes) and a recent report (internal) (cc @geropl). Thanks for opening this, @JanKoehnlein! 🏀

[github-actions[bot]]

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