It is not good to talk to people about someone who did wrong to you, unless you have no other way to stop the wrong but seeking help from people by telling them.
If your telling people will not change the situation, it can be also a type of back-biting unless this person who wronged you is doing it openly and is insisting on doing the wrong to you. Allah SWT says : Allah does not like the wrong should be uttered in public but by him who has been wronged)(Sura 4, Verse 148). If the
person who did the wrong insisted on doing the wrong on you and there
is no way to stop his wrong acts against you but to talk to others who
might help, then it will be allowed.