Once in a 12-day cycle, at the time of tahajjud, or after Esha perform 12 rakaat (2 at a time) Salaahtul Haajah. You can also perform 2 rakaats daily. In all rakaats, after Surah Faatihah, in place of the surah, recite 100 times per rakaat:
رَبَّنَا آتِهِمْ ضِعْفَيْنِ مِنَ الْعَذَابِ وَالْعَنْهُمْ لَعْنًا كَبِيْرًا
Rabb a naa aa tee him dhi’ fay ni mi nal a’ zaa bi
Wal a’n hum la’ nan ka bee raa
O Our Master, give them a double punishment and place a great curse upon them.
As you recite, focus on the meaning of the Verse, asking Allah (Ta’ala) to curse and destroy all the enemies who have wronged you.