[Advice] I am currently working in a startup. I have worked there for over 8 months, but only get paid for 3 months. What should I do ?

I have been working there full time. Still they aren't able to pay for last 5 months. Whenever I ask them about salary, they justify it by saying that they are trying to get funds, but to get the funding we need to create the product first.

To take care of my family and myself, I am working as a freelancer in the freetime. I don't know what to do?

Please suggest your views on this. Thanks