You should try engaging in that roleplay more. There is always something to be gained out of every encounter. Never get attached to the gear that you have cause at the end of the day it's a roleplay server. If you're upset seek out people that have had the same experience and start planning a revenge, or try to make an alliance with the people who robbed you. The opportunities are endless and getting upset over it OOC isn't gonna help you in the long run.