post https://api-sandbox.ca-dev.co/api/disputes/lenders//reopen
If the reopen status is PendingLender, a lender should update the dispute by providing additional documents and/or notes and then assign the dispute to the Merchant.
This call can only be performed successfully on a dispute that initially has the status of ResolvedMerchantFavor, ResolvedCancelled, ResolvedCustomerFavorFull, ResolvedCustomerFavorPartial.