Plagiarised in: Multiple Contests

This March I have participated March Challenge 2018. I have solved 5 problems and a partially one. But Codechef honored me with -863 ratings and now I’m a one star newbie from 3 star. I checked the problem and it says “Plagiarised in: Multiple Contests”. I mean seriously?? When you worked hard to get solution, finally solved and after the contest the judge gives you a huge negative ratings with a tag of Plagiarsm then your life become really beautiful. I am really depressed at this. Now is there any way to rejudge my solution or that’s it?

You already got mails for that. Please dont spam the forums uselessly.