Is it black magic?If you are sure it's black magic in that case you need to frequently be praying namaaz. Make sure you don't miss a single prayer. Also, after every Fajr and Asar prayer read Surah Naas and Surah Ikhlaas 4 times each. Before going to sleep, read the last 2 verses of Surah Baqara. This will protect you from the black magic. Try to keep a Quran near you at most times if possible and read Ayat ul Kursi as much as you can. This will protect you from the black magic inshaAllah. :)
I think this is the only thing you can do right now. I don't think a Qazi will do much for you as my cousin went to one and he was advised from him to do all these things which I just told you. So I hope this helps.
If you are still not satisfied and want a Masjid number then let me know and I will get it for you.