Hostingraja — I could not access the site I bought

I bought premium VPS hosting from Hostingraja.in because they said that the site would be highly available. But I could not access the site right now. I raised ticket but there is no response. Their service is the worst one I ever experienced in web hosting. The site is extremely slow compared to other hosting with the same plan. The site keep facing lots of problems. Now I could not sign into the cpanel as well. You can see it from the screenshot I provided here.