You may want to check the Zoom FAQ first to see if your question has already been answered. You should also take a look at the Zoom Users Guide which is a free download. You might also want to drop by our Discussion Forum to seek help and advice.
Both the Professional and Enterprise versions of Zoom come with 12 months of support. Additional support can be purchased by logging in via the PassMark site. You can find your Zoom order under 'Manage my products' and select 'Renew support'.