If someone is harassing you please use the block feature on d2jsp and within discord as mentioned previously in this thread.
Feel free to reach out to me directly if you are being harassed and if you suspect someone is hijacking your trade threads. Alternatively you can contact the staff group in charge of the specific section. If this is occurring in the trading grounds you can contact a Trade Assistant
or Trade Moderator
Harassment is strictly prohibited on d2jsp, you can find the specific rule here - d2jsp Site Rules
1. No flaming, insults, racism, degrading content, bullying, intimidation, harassment, or threats.
The staff are here to help with situations of this nature, and we would hate to have any user feel unwelcome on this site.