The short answer is you get support direct from the Virtuemart team by purchasing a 12 month "VirtueMart Supporter Membership": http://extensions.virtuemart.net/support/virtuemart-supporter-membership-detail
I then added "Max Milbers" on Skype. As soon as he was available he worked through my issues with me.Don't expect them to drop everything, be patient.I'm not sure if there are other ways to contact VM Support. Others might know?http://extensions.virtuemart.net/ticket
Like many people in the forum, I used to be one of the users screaming for the development team to make Virtuemart a Commercial product, so that development can progress faster, bugs can be fixed quicker and better support can be given. This is their answer! And I think it's a pretty good idea.
The different membership levels are Bronze, Silver & Gold.
Silver & Gold are essentially just extra donations for the VM team to put towards development. All will give you the same level of support, but when voting for bug fixes & new features the higher your membership the more say you get in the vote.
If we are willing to support VM like we all say we are, here's the opportunity.
Would recommend! Definitely worth it in my opinion.If you've got a membership, let others know what you think here. They probably aren't going to decide off just one guys experience.