Should probably Post this in bug reports, under haypi kingdom.
But in regard to your post- they normally appear within the minute. Some detailed information to give-
Approx time and time zone they were purchased
Screenshot of receipt (upload picture to computer)
With that the problem should be fixed. If not, make sure it went through on ur providers end, apple, android, windows, and make sure it was charged. If charged and coins do not appear after contact with support, contact your provider about a refund.
Wish I could be saying goodbye to Haypi, but I can't leave.