Unable to shift gears

Hello everyone, Hope i can get some help here. i got a chevy cruze 2011 diesel LTZ a year and a half ago. But suddenly one day while turning on the car. I pushed the clutch and tried to turn on the car. The clutch did not come out. I had to pull the clutch manually. It became so hard. I managed to get it to the repaur shop. They said it was the clutch and flywheel issues. I spent a lot on it. Trust me, just because it is my dream car. Then it came back. Made a run of 1000 kms. Now a new problem arised. The clutch pedal has become hard and i am unable to push the gear. It stands in neutral but never shofts to any gear. When i turn off the car, the gear starts moving. I tried consulting the mechanics, some say clutch failure, some say gear box, some say master clutch cyclinder and some say flywheel with clutch. I tried to get in touch with the service Center. They are charging a heck of amount just to diagnose. Have someone come accross this issue or have any idea. Pls help.