Google Play Store/Google Play credits

Does anyone have a clue how to fix Google Play Store please?
On a Samsung Galaxy ace phone.
I’ve looked on the Web it says I need to download a APK or something, then another contributor says it still doesn’t work.
Should I take it into the 3 store and let them have a look?
Any help appreciated

By the way, how to get google play credits?

Man, I am sure that you can fix the problem by yourself, you just have to search on geek forums la xda and so on. It’s very easy, you can do that, bro. There are a lot of different tutorials on internet. However, I can give you one more advice - on you can find a lot of free and legal google play credits and codes! That’s just awesome.