I have a samsung galaxy s3 purchased just over 2 months ago. and just yesterday googleplay started crashing. once I open it, it shows a black screen and then goes back to homescreen. sometimes it crashes when I press "install". at the same time, this message shows each time it crashes or when I restart the phone: "operation process.google.com.gapps has stopped" or something like that. I searched the internet for solutions and here's what I tried so far:
-restarted phone.
-deleted caches and history from googleplay.
-then i deleted them from all google apps i have.
-uninstalled updates from googleplay. now I only have the options "force close" and "disable" instead.
-changed date and time "though they were correct". then changed them back.
-tried rebooting "and by that i mean pressing the close button for like 12 sec and the phone was restarted". because i don't know what rebooting is.

got any solutions? or maybe even guide me through the previous steps correctly?