Break witchcraft black magic wicca at work

Last night four female individuals came together in the work place of all things, to place witchcraft curses on coworkers especially myself. No reason, other than mean spirited malice and maybe insecurity. They openly practice this at work and no on says anything. Unbelievable, one can do anything, but if i bring a Bible it's considered insulting. I had night terrors last night and the weekend before. They redicule the Gospel so all we have is fervent prayer. So please a lot of prayer for this, and these people; break all curses and witchcraft they are doing and wash all with the Blood of Christ. Give them the fear of God and expose what they are doing and have done for years. Please continue to pray for this, it is a large department store. God knows these four and others that might help. Also I cover myself with the blood of Jesus, need your prayer coverage too as I am in this spiritual battle there for myself and others on the floor. Lord direct my steps on how to deal with this.