my wordpress website is not working

suddenly all my wordpress websites hosted in has stopped working. it just says site can’t be reached.
after a day it starts working… i need a solution for this because i have to promote this hosting service to others through my tutorial…shall i promote it…is this trustworthy?

If only you would post this URLs so I can check if it’s working for me - would be nice, and also when Admin comes he’ll know where exactly to look in for problems.