Shopacado ‑ Volume Discounts

I used this app for a few days campaign but deleted afterwards due to order errors and lack of customer service.
About 17% of orders received during the campaign did not get applied the volume dicounted pricing so I had to manually refund every customer their discount. I reached out to customer service who did not make a big deal to fix this.
The app also changed prices by changing the currency of the sales price from time to time.

The developer needs to fix those issued I had and then this would be a great app.