Scammers are still able to send me email with old alias

Scammers are still able to send me email with old alias

So my old email alias got used up by scammers and now they have it, sending me spam mail. I deleted it a long time ago, I know it doesn't work because no program or even gmail is saying the old alias still alive, you can't send an email on it. However I still getting spam mails from these scammers.

This might be a bug since i made a brand new email that no one knows, i had set it up to where it shouldent be possable to send scam mail to me. The alias is gone, it should not be possable to send me mail though that adress.