Urgent situation!!! Friend’s brother have been cursed badly

Hey guys! I really need help with something rn. So my friend’s brother has been cursed by his ex that has a lot of knowledge about dark magic. He is currently becoming crazy screaming everywhere and beating his wife it is becoming real bad. We tried healing him and cursing her just for her to forget him and stop all of this. We really need to know what to do!
Please please share your best advices and tysm in advance.