Evette,
Welcome to Microsoft Community.
If you're facing issues with a corrupted hard drive on your Surface Studio2 and the Microsoft store and Geek Squad are unable to assist, here are some alternative options you can consider for repair:
You can still get support from Microsoft online. Visit the Microsoft Support website and follow the instructions to request service or repair. You can register your device and send it in for repair or replacement. How to get service or repair for Surface - Microsoft Support
If your Surface is a business device (owned by an organization), seeĀ Surface service options for Business and Education.
Your Sincerely
Hahn. W - MSFT | Microsoft Community Support Specialist