Unfortunately we have noticed that the updating of price and stock for offers on the third version of the API currently results in 500 errors. This means that updates are not coming through and will not be processed as a result.
We are investigating the cause and are doing our best to have this fixed as soon as possible. Please contact Partner Services if you encounter problems with orders or cancellations that are tied to this issue.
Our apologies for the inconvenience.
Update: As of 15:00 the issue has been resolved and updates can once again be processed. Because of the 500 error earlier updates have not been received and were not added to the queue. As such any updates done to price and stock on the retailer API v3 since 11:00 this morning have not been processed.