I cannot delete the account because of a forgotten phone number

I’ve created another Apple account. I want to delete it. I know the login and the password. I cannot do it because I don’t have a number connected to it. I tried to try to do something if I don’t have that number. I didn’t manage to. Apple is just silent! What’s the reason of that? They should have send me an email with the approval. They didn’t. And of course in my country there is no telephone support service.