Short answer
A charge after cancelling or pausing is usually the remaining balance on medication that already shipped to you.
The most common reason is the remaining balance on medication you've already received. The same applies if you paused your membership.
Your medication often ships several weeks at a time, while your plan is billed monthly. If you cancel or pause before that medication is fully paid for, the remaining balance is still owed. See What happens to my balance if I cancel?
If your medication was fully paid when you cancelled or paused, you shouldn't see any further charges. If you do, message us and we'll look into it.