How do you handle dealing with people who don't take abuse you have suffered seriously?

When you are vulnerable with them? Instead of taking it seriously, and helping you resolve it, they rub it in your face and laugh at you? I don’t understand some people. I have been told to ignore such people, and allow them to hang themselves. But it is really hurtful still.

There is this site I use, and I thought going to them would be a good idea. It wasn’t. Now I feel like I shouldn’t talk to people about it because you never know who will use it against you.