Inven-tech ripoff Coral Gables Florida

i contacted inventech about 2 years ago with a few of my ideas. the 1st one the ideas they showed great interest in. after i already gave them the idea they then asked me for over 800 dollars to get a search for it. they never told me about that before i sent in the idea. so they now have a multi million dollar of mine that they can rip off. and to top it all off the other idea i sent them 1st they said that it wouldnt work because certain companies would lose money because of my idea so they talked me out of persuing it further. then about a year and a half later i seen the same idea that i had sent out to them on the market. so im thinking that they ripped me off and stole both of my ideas. im just wondering what i can do to find out if they did steal my ideas or not.

Joseph
beaver, Pennsylvania
U.S.A.