Invoice is not been attached with my order despite success Response From AWS MWS submit feed api with feed type : UPLOAD_VAT_INVOICE

I want to automate the process of invoice upload for My amazon bussiness account. For this purpose i used Amazon MWS submit feed api to submit my invoice. on Invoice upload Call execution i got the FeedSubmissionId => 375418018915 With FeedProcessingStatus=SUBMITED . and when i recheck FeedSubmissionID via Api its showing with FeedProcessingStatus => DONE That means invoice should get attach with the order id that i provided in metadata of the api call but When i open the order via sellercentral Interfact of Amazon Invoice is not showing against my specific order.
As their is no error code returns from api response as well so i dont know what to do next.
For Reference OF AWS Team: My Order id for which i am trying to upload Invoice is => 402-xxxxxxx-8941126
Feed Submittion Id That is receive in api call response is => 375418018915

We followed this guide: https://m.media-amazon.com/images/G/03/B2B/invoice-uploader-developer-documentation.pdf

Thanks