My ex is acting weird... Am I wrong to be annoyed?

So I dated this guy 5–6 years ago. We only dated for 8 months. During that time, he was very manipulative, clingy, controlling, etc. I eventually broke it off with him. After breaking it off, he stalked me for the longest time. One day I was with my personal trainer and my ex just happened to show up where we were. My personal trainer threatened to call the police. That is when my ex stopped stalking me.

Anyway for the last year or so, my ex has contacted me multiple times asking for my dads number and address. My dad is a physician and my ex wanted to shadow him… I gave him my dads number but not his address. So he shadowed my dad and he wanted a letter of recommendation. My dad did not want to write him one.

Well now my ex messaged me AGAIN asking for my dads number again! I don’t know why! I never messaged him back because of two reasons. 1.) My dad and I both can’t say no, so I think I put my dad in an awkward position
2.) How dare he treat me the way he did and then come back and expect me to be open to him contacting my dad. I gave him my dads number once out of pure guilt, he should have enough responsibility to hold onto it. And why did he want my dads address??

This is really bothering me. Am I wrong to be so upset?