Why is my ex acting like this?

I haven't contacted my ex boyfriend for over a month now
I blocked his number and social media

Today he sent me an email saying he needs to talk to me
And i replied "ok i will call u after work around 6pm"

But i never called him

Then 1 hr later he created whatsapp and started messaging me
"U said 6pm.. wtf?"
And started calling multiple times
And messaging me a lot
he's not over you
He wants to tell u something
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Why is my ex acting like this?
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