Do not recommend this app if you have a high volume of orders. Orders being merged, but then items being restocked and overselling. Not to mention then having to invoice for more shipping.
Thanks for writing your review for Mergify!
We apologize for any inconvenience that our app made for you. Our support team has contacted you for more elaboration on these problems, so we can solve these issues for you.
Generally speaking, You have stated two matters:
1. "items being restocked and overselling"
2. "having to invoice for more shipping"
Regarding the first one, when you merge orders, Mergify archives the original orders and makes a new combined test order that neither increases nor decreases any product's inventory quantity.
For the second matter, the overall shipping cost is usually lower than the sum of the original orders ones.
We would really appreciate it if you elaborate more on these problems, so we can solve them together as soon as possible!