Blocked my dad although we barely talked in 15 yrs

I barely talk to my Dad for the past 15 years. We are living in different countries. I am visiting him last week and had a mental meltdown before arriving. At his place, hearing his words, I broke down again and locked myself in room for the past two days. I was unable to stop crying. I blocked him on my phone after sending multiple text accusing him for the pain he has caused in my life. It feels good. Although I am the forgotten one for the past 15 years, the step of blocking him gives me a strange feeling of calmness and relief. It makes me feel he is finally out of my life. I didn’t realize the abuse before leaving home for uni. In the past 15 years, I learned to identify his voice in my head, removed that voice, but still deeply influenced. Especially when I am getting old and become depressed by life, his influence comes back like a spirit even he probably has forgotten about me. I wonder how long the effect of blocking contact is going to last.