I tried resolving my realtionship, but the person started fighting with me. It made things worse.

As we shared in the session, simply by writing to them you have done your duty. Whether they reply positively or negatively, that is not in your hands. You simply have control over your own actions, not on the reaction of the other person. We suggest that you simply write back to them, that you understand them and do not engage in further conversation. 

It is important to be careful not to blame the other person in your communication.