Syndicated Estafa?

An employee of a big oil company represented her office and invited us to invest in them. She acknowledged her receipt of our money through written document and also issued personal checks in case we wanted to withdraw our money. Last November, when we heard about the Aman Group we were also alarmed and decided to tell her that we wanted to withdraw our money for our safety and to be sure that she didn't invest that to the Aman Group. However, through confrontation with her it appeared that she used the money for her personal use and to pay the first investments' interest. No more principal and interest. And she was telling that her "boss" will pay for her. The total amount of our money is P250,000 which is supported by checks but in total there is P3.3M. Her boss will pay the P3.3M in staggered basis of P40,000 per month. And to our computation, it would be paid in 6 years. That is too long. So since we have the checks with us, we are planning to present it to the bank knowing that it will bounce. What legal advice can you give us?