blocking number after texts deleted
I know how to block numbers connected with spam texts, but I just deleted a string of them from someone I know who I now wish to block. I still have this person's personal information in my contacts, but I can't figure out how I block calls or texts from them without having a message or call right there to block. I'd really rather not have to go through restoring messages, if that's what it would take.
Come to think of it, I probably screwed up the same way in e-mail, too (only on computer, not on phone). Is there a way to block an e-mail address if the mails are already deleted and deleted messages have been erased?
Thanks.
iPhone SE, iOS 14