MyBulk ‑ Bulk Discount Creator

We were initially really satisfied with this app, but recently the app seems to reset the dates on our codes to 2017?!? We're now getting very embarrassing emails and messages from customers telling us they aren't working. We've reset the dates twice now on the codes, but have changed back to 2017 after a day or so. We're already busy enough so we don't need the hassle of having to check that the codes are valid all of time.