I live in the U.S. so it is really hard for me to relate to you, but I'll tell you what I tell most people who find themselves around people who are not supportive. Just surround yourself with those who really care about you and surround yourself with people who do not mind training with you (men and women). Develop a strong training relationship with them and ask them if they will help you out. Also, if there are other women that you train with just keep training with each other if most of the participants are not supportive. Even if you switch off between three of four different people. The group of you can keep watch out for each other and partner up if you start getting left out again. There are times that I stick around with my fellow dojomates at seminars because I would be intimidated even without the gender problems that you are experiencing.
You are more than welcome to send me a Private Message if you want to talk any further.