Lost My Boss rush ticket due to the Server lag issues

Me and my friends tried to do the Boss Rush today on the EUC server After having to queue up about 3 times, my friends got in but I got kicked out as soon I joined and lost my ticket. I contact support and they told me it’s a known issue and can’t do anything to help, I just lost a huge amount of progress, this is unacceptable I want my ticket back.

Server: kadan