Deleted appointment slots are still blocked out

I created a form with appointment maker.  I had a couple people register as a trial and then deleted their form but the appointments they picked are still blocked out and I am unsure of how to reset them.

please help

Hello @skybacher

We're sorry for the inconvenience this may have caused.

Could you provide us with the form URL (link) and inform us which date/time(s) you expected to be available?

We look forward to your response.