I am receiving this error regularly, my website has worked perfectly fine since April, operated in the same way. Now simple PHP tasks, such as logging in will cause it to give me the 503 error, this needs sorting out, we may be on free hosting but at least provide a working service. Everyone on the hosting seems to be getting it and with my website it is very frequent and disrupting everything. I even tried to upgrade to premium so I could rid of the errors and the upgrade form doesn't even work.