Engine Stall problems of the 2008 Toyota Matrix

We bought the car used in GA August 2012, 3 months later the engine would come on but electrics wouldnt, wouldnt move out of park. The dealer couldnt re create the problem to find out what was wrong so we delt with it for months until the power shut off on the hwy. It scared us. It quickly shut back on thank god but we been in touch with corporate and the dealership without any luck or help on fixing it. Finally July they said it was the ecm and tried to charge us to fix it. 3 weeks later the stalling continued. We were sent here by a friend and just now 2 years later find out about the recall. We also found out the same dealership where we took to fix it that couldnt identify the problem was the same one that fixed it initially for the recall. Now corporate and the dealership is denying that they fixed the ecm in July though I have an invoice stating so. Also, denying there was ever a recall. Its dangerous and terrifying to drive not knowing when and where the engine will stall. It was fixed 2012 a few months before we bought it, fixed again this passed July supposedly but is still stalling so its a reoccuring problem. Hopfully the proper procedure is followed to ensure the safety of my family and who ever the next owner will be.