Why hasn't my ex unblocked me from Whatsapp?

Anonymous
So we had an text argument and he told me he was going to delete me as a contact just because I told him I don't think i can just be friends with him and that I rather go my separate way. But when i texted it, i texted it in an irritated and argumentative manner. He then said he'll delete me and everything and that he's has no time for arguments. After I told him to delete me, he did but I realized he didn't block me. So I told him he forgot to block and he did. I texted his other phone and apologize and decided to just stay as friends. But its been days, like 15 days and he haven't unblocked me from whatsapp from his other phone. I also realized he would only get whatsapp just for me and he'll stalk me (if you want to know how i know, just ask)

Last time he invited me to a lounge and he text me at least 1 or 2x a week. But if we're fine why haven't he unblock me?
Updates
+1 y
He text me from his other phone normally by the way.
Why hasn't my ex unblocked me from Whatsapp?
3 Opinion