Go to the old sold items page https://www.trademe.co.nz/MyTradeMe/Sell/Sold.aspx click the feedback number of the buyer, and you should be able to see your feedback and an edit link.    

I assume it is all MVL listings, not just Max's Gary-NZStocked? Better add a note to my "you didn't choose what you wanted" email :/  

Works for me in 131.0.6778.85 desktop chrome. I don't use the app.  

Works for me, Chrome desktop 129.0.6668.89    

Works for me (just checked the first random listing with choices I could find, not one of yours specifically). It is not uncommon (at all) for customers to just leave it as the first-selected-option.  For that reason I make all my listings have the first option be "Default / Random Choice", that way    1. I know they did that, and can check with them what they actually wanted   2. if they don't respond (more often than not!) then I can quite rightly just send them what I think is best/have most of/reach first

Most likely explanation is you made a typo, selected a different product (bag vs box), or a different carrier (NZ Post vs Aramex). If you post the dimensions, weight, source city and destination city I can see what the shipping thing results for me.

Just block/filter their email address and forget about it. If they had apologised and offered a refund straight up and changed their listing description appropriate for future buyers, then it would be different, but they clearly tried to pass it off as not a problem and only have decided to refund after you red faced them.

It ended up invalid or some such for me too 2-3 weeks ago I think.  I'm certainly not out of NZ.  Figured it was a bug.

Items drop off your won items list after 45 days, and dispute reports need to be made within those 45 days.  As your purchase was 17/8/24, the last day for a dispute report was 1st of October. You will need to contact Trade Me to see if they can file a report for you manually. Otherwise the Disputes Tribunal is the best bet.  As you have video evidence of the problem, it should not be too difficult to prove it was faulty, and in which case the retailer was required to either repair, replace or refund you (not store credit).

Bidbud can place bulk feedback. I don't use it myself (have my own system), just remembered it exists :) https://www.bidbud.co.nz/selling/sold Looks like you tick the sold items you want to feedback, and complete it at the bottom of the page (all selected will get the same feedback).