update website Joomla 1.5 to 3 with virtue mart, users and order database

I run a small software company who's website is built under joomla 1.5 with virtuemart as online store . Though such old joomla has vulnerabilities and we get frequent attack that put the website down. To solve this, it's required to update to recent joomla. Obviously this would also mean updating the component like virtue mart etc... Overall, I don't mind what is used in the end if it work as long as existing users and orders are preserved. That's about the only requirement and If we enjoy working together, a full redesign of the website can be envisaged. Please submit me your rates and availability and we can discuss further details [Removed by Freelancer.com Admin - please see Section 13 of our Terms and Conditions]