You will need to call Intuit Phone Support at 1-800-446-8848 for help with a refund.
Go to this TurboTax website to request a refund for the software purchased from TurboTax - https://support.turbotax.intuit.com/forms/refund-request.jsp
Go to this TurboTax Canada website for the Canadian editions - https://turbotax.intuit.ca/tax-software/index.jsp