We are looking for a solution to the below scenario: 1. The user makes a purchase of 4 vouchers in an order. 2. The user spent the 2 vouchers at the vendor shop. (So, suppose the order became partially fulfilled.) 3. The vendor makes a mistake by redeeming all 4 vouchers from the user.( So, the order became fulfilled.) 4. The user and vendor request to Ops for a cancellation of the 2 used vouchers. 5. The ops couldn't find any way to do it via the Shopify store interface/app. 6. The ops requested the tech team to create a tool that can invoke Shopify API to achieve the cancellation of two used vouchers. 7. The tech team searching for a solution and advise how to best do it?