Customer restriction for bladed policy

Hi, requesting help please. We have a razor hoe that has been blocked from sale because it doesn't have the UK 18+ age restriction on the listing. I cannot find this restriction in the back end of the product listing nor is it on any upload file. I have opened a case with Amazon but I keep going around in circles as they keep saying that I need this information on the product listing in order to remove the suspension! Has anyone else got around this please?