Changing UPC if you have brand registry and own the brand / product

Hello, before I get bombarded with comments saying what a fool I am for not doing this from the start – don’t waste your time, I’ve been kicking myself for ages. I didn’t realise how cheap it was.

I sell a unique product on Amazon, I own the brand, I’m the manufacturer, it’s my name / packaging / product. No one else sells it on Amazon.

Stupidly I set it up with speedy barcodes back in the day when I was selling a handful of products. Now I have a high rating and make a decent return per month. I have brand registry.

I also still have speedy barcodes. Urgh. I have bought GS1 barcodes and want to switch over without losing my listing (hah!) and I’m getting contradictory advice online. There’s a company who will do it for $500 per listing… which would be nearly $50,000 🙂 it’s completely out of the question price wise.

Does anyone have any experience of changing the product UPC if you own the brand? It was a genuine error. I’m in the process of updating the barcodes on my website so they are all GS1 but obviously I need Amazon to match that, without shutting me down or making me start new listings.

The advice online seems to be – start a seller support chat, clearly set out the old and new UPCs, take photos, attach proof of the GS1 purchase linked to your name / company, submit then pray…

Any advice? Thank you so much