How to deal with black magic?

I am Sorry if this seems a very long message, Let me explain you what exactly has happened, My fiancee was in relationship with this girl, however she robbed his money, so eventually he did a case on her which was going on for 2 years, But last month December, he won the case, giving the girl of 12 years of jail time…eventually she ran away…while doing so We talked with her brother who told us she paid 2000 inr and did a self harm kind off magic, now her brother doesn’t know what type magic he only knew this information he gave it, however we don’t know how many black magics and people she have met, but suddenly the appointment dates of court was missed by my finance thrice which was very weird, alarms suddenly didn’t wake us up causing us the delay for final procedures of the court…meanwhile she got time to roam around….then suddenly my fiancee’s behaviour started changing he started blaming himself and questioning about his existence, his anxiety problem got serious and been to hospital several times as he wasn’t able to breathe causing my fiancee negligence in the court procedures…and the girl knows that me and my fiancee has started a new company and she is trying to delay it…..and fiancee almost lost his life in hospital but recovered within 4 days being on oxygen mask…..during this hospital time the girl escaped to Jaipur,I contacted her brother who confessed that she again did some kind of magic where she has sacrificed her own blood and she has marks on her hand….now we did not think much about it and started chanting hanuman chalisa and going to temple…we contacted one person who told me to do lemon needle ritual where you have to throw it on a cross road he told us while doing so the black magic forces would stop us…again we did not think much about it, it seemed simple..my fiancee’s best friend started doing it but eventually he got a call which they ignored, but the call came thrice he picked it up, his wife had fallen down stairs and was hurt, so the ritual didn’t happen, next day the again started it where my fiancee lost his breath leading them to a hospital…at evening when they came back home they were stopped by bunch of dogs which stopped them from going at home…my fiancee went home later and he saw a person at home on Sofa he was scared , then his best friend came home no one was there the things which were scattered at home was now aligned properly in one place. My fiancee who always loved to go temple, since 2-3 days he has stopped it , as soon as I tell him to go temple he gets annoyed, and shows strong wish to not go…today I forced him to go temple, he went temple and got out and he lost his breath again and today he went to hospital again. I have no idea what to do, he started mantra, I feel stuck. That girl who was supposed to be come jaipur to Bangalore in police custody again ran away, she was now tracked in Mumbai. I am losing my hope day by day. Please tell me how to tackle this problem I have no idea what deity is involved neither do I know which exact ritual was done, But a girl who robbed a man, misused his love, put fake allegations of SA thrice which was later proved wrong doesn’t deserve a good life ahead, she deserves to be behind jail. Kindly help me. The things that have been doing till now: daily pink salt bath, salt has been put on windows and doors, daily mantra , hanuman chalisa