My engagement was broken and former partner acts crazy.

So I was about to get married to this girl. Because we didnt know each other we started spending time with each other to understand better. The more i started to know her the more i found that we were different. She had her own requirements and she wanted us fulfill as her conditions and i had no issues with most of them. A week before her engagement i discussed about her requirements with my family and we came to a conclusion that neither me nor my family (mother, father, brother) agree to following.

1. She wants to continue to be in contact with her previous boyfriend after our marriage as she still feels strongly for him.
2. She wants my mother to cook for her and do her chores.
3. She dont want to see me as her husband after our marriage and wants me to be physically away from her.
4. She dont want to follow our family dress code and traditions.

I didnt want to make any decision before discussing about it with my family because i thought that they chose her for me because they liked her. (I was not in my city when things were decided.)

After this we decided to cancel the engagement and had a meeting with her and her family about it. After things were finalized she started texting me and calling me telling that she wants to take back her conditions and she wants to go ahead with engagement.
She continued doing this for two days even after i have explained her that it is too late as our engagement is broken and it was very painful for us and our family. Today in the morning she texted me telling that she is engaged with someone and it is a good news. After i congratulated her (feeling relived) she started blaming me for ruining her life and started forcing me to help her to break this engagement.

For now I have blocked her but i know its not a solution.

please help me as i have no idea what to do about it.

Recently she disclosed that she is under medication for depression and seizures.