Write to help@dramatiq.studio and a person reads it. Say what happened and what you expected instead — that is usually enough to find it.
Include your device and iOS version. If it happens every time rather than once, say so; reproducible problems get fixed fastest.
Write to help@dramatiq.studio and we will delete everything associated with you, then confirm when it is done.
Coins are bought through Apple's In-App Purchase. There is no subscription and nothing auto-renews.