I'm sorry for your loss, but these scammers prey on peoples greed. Take it as a lesson that "if it looks too good to be true, it probably is". Do not assume that because google accepts an advertisement, that the advertiser is legitimate (but it might be worth reporting it if you can find the advert again). If these people were able to double their money every 7 hours, why would they give this service away to random strangers? You are lucky to make 5-10% per year with mainstream investments, stick with that.
That's what I have already done. I have also sent a mail to Google describing the detailS. I don't expect Google to take any action but by chance if it takes some action, this is where it may hurt them most. They will not be able to advertise at the top under the biggest search engine and it will make very difficult for them to lure the other victims.