Greetings.
Curses do work. It depends upon how passionately they were delivered and who delivered it. It had to be delivered in person. The recipient should have some doubt and some guilty feelings about the subject addressed in that curse. Then the mind of the recepient starts working negatively. His/her own mind power brings the downfall for them. Initially due to mind power, small things go wrong. When that person starts panicking, the whole thing develops in a snowball effect and important decisions gets affected. That's how a curse works.
Remedy - Always have pleasant thoughts and positive thoughts in the mind. If something wrong was commited to someone else, kindly remember it can't be taken back. Nothing comes back to normal. So, it is meaning less even to try for that. If commited a mistake, sincerely seek an apology, express your regrets and if possible, pay damages and leave it at that. If the other person refuses to accept your apology, refuses to get back to the stage prior to the event, then it is not your fault. As long as you keep your mind at peace, no curse would affect you. The whole thing is the power of your own mind. Always think positive, think pleasant and be cheerful. Always remember - you are the most important person for yourself. Don't worry about the rest; but don't hurt others physically or psychologically deliberately.
Chhers!