I am absolutely going round in circles (as usual) with Amazon.
I have a product that has one value that is incorrect, the size, so I need to change it.
However, from Amazon I cannot edit it as it said it doesnt match what is already in the catalogue.
Seller support suggested doing a partial update via feed. This came up with Error Code 8541 – Matching error.
Brand registry support suggested deleting the product via feed upload, waiting 24 hrs then re-uploading and a fresh upload. This came up with Error Code 8541 – Matching error.

I then reopened the case and was passed back on to seller support who said I cant upload the feed without the information matching. Well then what is the point in trying to update/change info if it needs to match what is already there?

Seller support said to speak to catalogue team, so I phone up and they say I cant speak to them, only via email. I reopen the case asking to speak to the catalogue team, and seller support completely ignore this and proceed to tell me to upload a feed file.

Have done this dance several times for the last week. Does anyone have any suggestions.
Their support is the most ridiculously designed support systems ever created.