I made a promise to Bhagwan that I would not effuse semen for a month, and if I did, I asked Him to throw me in naraka or make me go through animal reincarnation (8.4 million times). I broke it.
Also, I had my upanayana at age 13 but broke the vow because I did not know about the vow and then when I did become aware, I continued to break it because I felt it had already been broken and I was already addicted. I made the vow above on the question such that I thought it could break my addiction but it did not.