What is an effective dua for victory over enemies, punishment for those who have caused harm, and justice?

My boss is a Saudi person. Some 17 years ago, he wrote nasty and annoymous letters against his deputy and circulated widely. The management took serious not, and even though they knew that my boss was the mischievous person sending that letters, they could not take any action, because he being a Saudi and more they did not have any evidence. I as his direct subordinate was asked by the managment to give evidence against my boss that he was the culprit. I knew he was. My boss pleaded not to give anything in writing and that he would get me back, even if I am deported. As a loyal subordinate, I did not give anything in writing, the result, that I and my family underwent lot of humilation, mental and physical torture, agony, persecution, harrassment. Even our dues of 10 years of service was not given. More inhuman was that my three months seriouly handicapped child was not allowed to get medical treatment. All knew that we were innocents, and were sufferring for the acts of my boss. Finally, tired of all the persecution, we adopted to get deported. After my return, my boss is avoided recalling me or helping us getting us justice for all the wrong done and giving us our rightful compensation for the sufferrings and illegal termination. When I call the boss, he gives false promises and avoids my calls. This is nothing but betrayal. Instead of being rewarded,my boss is resorting to these tactics. I and my wife have been writing, appealing to all those who matters, but no one is responsing. All this in a country, which is ruled in the name of Allah, of which the Holy Qur’an is the Constitution, and Shariah is the law. Even people who I had helped, are avoiding and also play dirty games, trying to settle scores. I have more detractors than friends. They all want to give as much as trouble they can. Here I want to know the supplications of getting victory over my enemies, punishment for those who have caused us enormous harm and sufferrings and those who had betrayed us and more to get justice. Can yo please give me duas in Roman English, as I do not know Urdu. A religious scholar told me to recite this dua ” Allahumma innaka …….Allahumma inaka la tuklufil meead Allah is sufficient for me. Please suggest duas which can be effective and grant relief to me. Jazak Allah Khairan.