This reminds me of my XAH many years ago. I was not smart like you. I was young and naive.
I moved 2000 miles away from him.....from the east coast to Colorado to get away from him. He showed up on my doorstep one night. I let him in. I thought how romantic. He must love me to follow me 2000 miles. I married him and that was the beginning of my nightmare.
You know how this will play out. You are so much smarter than I was! Do whatever it takes to stay safe. It's not the end of the world if you have to change your phone number even if it's for business. I had to do that last year (I own a business) when that same axh started to harass me after being divorced from him for 30 years! He began to call my office number. I filed a restraining order on him for harassment ( got a temporary because we could never get the permanent one served). It stopped the nonsense.
Glad to hear you have a sponsor. Take care of you. You'll be in my prayers.
gentle hugs
ke