If I'm engaged, why does my ex boyfriend still tries contacting me?

I believe if someone keeps blocking an ex, they've made it crystal clear the ex isn't ever welcome back in their lives, esp if the break-up was under bad terms and they were a legitimate horrible person.

That's a narcissist that owes me over 1K and he had the nerves to ask for a friendship just days ago on my Whatsapp. Isn't the reality that I'm getting married enough for him to get lost? I'm engaged, happy in my love life, eager for my fiance's arrival and looking forward for our day. If it's so obvious I'll keep blocking that loser, why is my ex boyfriend still trying to contact me? I get that he's a narcissist but don't they get tired at some point. It's already been 3 years since the break-up.

If I'm engaged, why does my ex boyfriend still tries contacting me?
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