The site has existed for several years. But the address is in the middle of a residential area. Some sections of the site are not finished.
Many small business operate out of residential areas, and they often have one person who does everything and thus can struggle to complete less critical things (like a web site). But as a small business their overheads are lower, and they can offer better pricing and more personal service.
They don't answer emails and the phone number always rings busy.
Then why would you order from them? How can you expect after sales support if they can't even provide any pre-sales support.

Is this site reliable ? Does anyone have a recent experience of buying equipment on this site?
Even if someone here has had a good past experience, that may not translate to current purchases. I don't know anything about this company, but I'd suggest you try to find an alternate supplier if you cannot get a timely pre-sales response.