Sage and Paige USA review for Syncio Inventory Sync

We have installed the app and found that the app will hackjack the inventory sync even if you didn't turn it on. We had turned on the product sync only but it keeps updating our store inventory. We used another multistore app for inventory sync and it makes double count. Then we have disconnected and realised that the ALL inventory has been removed after disconnection. And our live website keeps hidden our products, we missed lots of sales. Then we tried to uninstall it, the removing inventory tasks won't STOP. And we tried to contact them with email only during the Australia business hours (This company is Melbourne based and we are Sydney based). And there is no one replied us back for more than 2 hours as this critical period. They have removed 600+ SKU and keeps removing the inventory. We even tried to contacted their CEO and founder in LinkedIn but no response still.