Repair Inaccessible Outlook OST File

My main Outlook data file (.ost) suddenly refuses to open, and every quick-fix I have tried has failed. I need someone who knows the inner workings of Microsoft Outlook data structures to bring the file back to life and return all my mail, contacts, and folders exactly as they were... (Budget: ₹1500 - ₹12500 INR, Jobs: Data Backup, Data De-duplication, Data Recovery, Microsoft Access, Microsoft Exchange, Microsoft Outlook, PHP, Technical Support)