Power Steering Fluid problems of the 2012 Ford Edge

We have a 2012 Ford Edge purchased new. We've been having issues with power steering failure going on for about a month. The service center cannot make appropriate/reasonable repairs to our vehicle. It's been in their shop 3 times and still looses ps fluid rapidly. 1st time, they didn't have part. 2nd time, replaced high pressure line. 3rd time, replaced failed ps pump. Vehicle still continues to leak ps fluid. The vehicle is unsafe to drive, and we are afraid loosing control of the vehicle and/or being stranded on the road. We can't afford the time and cost to have it in the shop every other week. The vehicle will soon be out of factory warranty and are afraid of this ongoing problem. We are very unsatisfied with Ford's products and services. We don't know what to do at this point. Nobody seems to be able to help us.