Ford Harrismith

Hi I recently had my Ford 2.2.. 2012...bakkie at Ford Harrismith dealer as vehicle goes into limpmode and power terrain light comes on. The dealer then said it was my intercooler hose that was burst. I paid them for a repair and replacement of hose. I found that to me it seems like the hose could of been cut with a sharp object. I am a technician and to me a vehicle with that size of cut should of smoked and should not have any power. The vehicle still does the same and after 3rd time I had send the vehicle for repair they now want me to replace my turbo and pay for the full repair. Again I will state that the vehicle has no power Los and does not smoke, plus good fuel consumption. I feel they should at least credit me back for the first repair as vehicle still has the same problem and I can't pay for school money.