Hey Gian. On certain devices, the only direct modifications that can be performed on the Google Play Store is to uninstall updates - to do this, do one of the following (depending on the version of Android your device is running):
Settings - Applications - Manage Applications - All - Play Store - Uninstall update - confirm
Settings - App - All - Play Store - Uninstall update - confirm
After the uninstalling, Play Store will auto update the next time you run it and common issue you were facing will possibly be resolved. Comment below with any other necessary assistance on this.