Így gyorsan 2 megoldást találtam, az egyik az, amin elindultam:

"Download a root service from the store called "Disable service" (again make sure root is installed and the app is given root permission)
Now, in the disable service app, navigate to the system app tab and find Google play store. Tap on it and you will get a list of services
Scroll to the bottom and uncheck "check Wifi And Update" service.
You will see a "please wait" notification, and at the bottom busybox should appear, notifying you that the app was given root access
Exit the app and voila! Google play store will never update itself or Google play services ever again (unless you install a new version, in which case you would need to repeat the process)"

"install busybox, then terminal emulator
stop whatever internet access on your android, or it will silently auto-update store, making your hard typing work useless
open settings -> app manager and find play store. tap on it. it will open properties window. there will be button Uninstall Updates. Tap on it, click yes on "replace with factory version?" question.
because there is no internet connection, this is the moment the play store couldn't be updated. let's use it.
open terminal emulator and type commands one by one (numbers are just for order, don't type them):
su
(at this time supersu app will ask you for granting root access for terminal emulator app, click grant access)

touch /data/app/com.android.vending-1.apk

chattr +i /data/app/com.android.vending-1.apk
Enjoy! Regardless of internet connection, play store is now has version YOU need, not GOOGLE. This might work for Play Store 4.8 and up, but I didn't test it."

You are the result of 3.8 billion years of evolutionary success, act like it. Sarcasm is the body’s natural defense against stupidity.