As a 32 year old female that needed to do something with her life, I decided to go into Computer Science. So far, I enjoy it and I'm good at it. We'll see when it comes to the actual job market, I suppose. There are a lot of incentives for underrepresented groups when it comes to recruiting for the field, including lower unemployment rates when you graduate. If you look at the raw statistics on the parent article the job numbers are still very encouraging.
The unemployment rate for women under 55 is about 75% of the general female population. While that doubles to 150% for women over 55, I think that there are still enough opportunities out there for the motivated worker. Whether you start teaching, learn new technologies, take a pay cut, or a combination of the three, you're willingness to change will only work to serve you. You can't expect the industry to adapt to you.
I'd say there has to be a proper chain of command which you can go through. I'd start with the IT department. A random email from an unknown address may be filtered or just ignored so if you don't hear back in a day or two, make a phone call. Tell whomever answers the phone you are calling regarding a potential online security breach and you need to speak with the head of the IT Dept. Heck, even speaking with regular security may get you started. In your email, and potential phone call, you need to sound professional, non-threatening, but insistent. As previously stated, credentials and jargon matter. Hacking has a malicious connotation. Also, "I'm sorry, but I need to speak with your supervisor" can do wonders. As each person answers the phone or email take down their name.
If you've gotten to the head of the IT Dept or the head of the company and the issue still hasn't been resolved then you definitely need to go to the investors and shareholders. They are definitely going to listen because this impacts their bottom line. If for some reason they don't, then contact local media.
As with anything it's not necessarily what you are saying but how you are saying it and to whom. I can't help but think you just haven't gotten through to the right person yet.
The first rule of intelligent tinkering is to save all the parts. -- Paul Erlich