Thank you for reaching out.
We like to update that we don't offer commercial support for open source product.
I have put together some resources below that I hope can help you solve the problem that you're seeing. They are fairly comprehensive and should be able to help you find the solution that you're looking for.
Our community site has answers to many open source related questionsVtiger CRM 6.1 Discussions
Our partners provide paid support for Vtiger CRM Open SourcePartner directory