does therapy even help if you were ever in it because of self harming?

I started self harming myself when I was 12 years old and continued until I was 19. In years seven my friends found out and told the teachers and I was forced into counseling it didnt help me as I didnt want the help and alot of kids at my high school food out and started teasing me to this day the scars on my arms and back are very visible and awful to look at every day even though I regret doing it I wear them proudly. No matter what anyone said I wouldn't stop and have been to hospital 3 times because of cutting veins. I have had 2 blood transfusions to make up for blood loss. When people starting finding out at school I begun to cut more often as it became addictive it's a very dangerous thing and I want you to email or message me if you have any questions at all. The last time I cut the wound was 1m wide it was the most horrible to watch clear up and I got a blood infection and was sent to hospital again. It was then that my dad cried to me to stop. And I did. Message me if you need please seek help. Because I never did and there were alot of times I was close to death