When you say, "I've explained that to management" -- was this in writing? It works much better if you do this in writing, especially if this is a public medium

When you say, "I've explained that to management" -- was this in writing? It works much better if you do this in writing, especially if this is a public medium you can refer to, like a JIRA ticket or a message in a public channel/mailing list. This way you at least can say, "I warned you but you refused <link to refusal message>"