1. You had partnership with him or purchased domain name from/through him?
2. If you had purchased the service of your friend being the service provider & your said purchase of service is your sole business for your earning your livelihood , then you are a consumer as per Consumer Protection (Amendment) Act, 2002,
2. File a consumer complaint before your local district consumer dispute redressal forum alleging deficiency in service and unfair business practice claiming handing over the soft copies of your documents, damage and cost.