Hi,
Thank you for posting your requirement.
My name is Inderjeet and own a small 4 member IT services firm based at Chandigarh,India. We have been into IT since 1994 (desktop software), into Web-apps since 2001 and Wowza/FMS based video streaming/VOD apps for about 3 years. We also maintain our clients' servers (mostly linux) on their behalf besides fiddling with our own Linux test bed VPS's and VMs. Currently exploring International clients through these portals for mutually beneficial and long lasting collaborations.
You haven't mentioned the OS and Control panel on the VPS. Such issues usually need to be sorted out when they happen so It may take a few days to check and fix this issue. You also mentioned getting this checked twice earlier, so what was the problem then?
Could you please update: the OS, the hardware specs, how many visitors tentatively?
At this point I cannot estimate the cost because I don't know how much work is involved. It could take only a minute if some setting is incorrect or we may need to wait for 2 days for the problem to surface so I cannot tell anything without looking at the server. Sometimes there are evident things from the logs but at other we just have to wait for them to occur.
If you feel we could work on this, please let me know your thoughts. I looked at the site and it seems to be running fine at this time. You also have nginx running. Great work, by the way!
Let me know if you have any questions or concerns.
Sincerely
Inderjeet