HTC Desire HD — Cant download anything from the google app store

I have got htc desire 500 and few days ago , my playstore stopped working , i did everything i could find on google and different forums but its still not working , please somebody help me . And the stupidest thing i did was to restore factory settings , now i dont have a single app on my phone and cant even download any

And i even uninstalled the playstore and downloaded it again but still no use , do u people have any idea if there is something like playstore , i mean not the google one but any other app like playstore?