How to tell ex to delete my number after blocking me on twitter?

[Sapphire]

You can't make him delete your number - nor can you start threatening legal action as one person suggested, unless he is harassing you - and, in fact, you state he has already BLOCKED you, so I can't see that he has any interest in you or contacting you. What "issues" ? You're the one making a fuss. He has already blocked you and seems not to care.

WhatsApp is annoying because all it takes is for someone to have your number, and you appear on each other's contacts - there is no adding/deleting, like with bbm. Also, blocking does no good as they are still able to see your picture and status.

I would let it go. He doesn't seem to have any interest in contacting you, hence his blocking you on twitter, and this just seems like sour grapes from you, to be honest.

EDIT. Have I missed something? I'm not sure why everyone is advising you "ignore him and he'll stop" - is he harassing you? I don't see anywhere where you've said that. It seems rather the other way round, to me. You're sour that he blocked you first, and now you want to do it back.