0- if this problem is with Google.
1-root phone ( search for tutorials, u need QuickShortcutMaker and make a shortcut of activity called Flyme )
2-Root Explorer
3- move from data/data folder ( com.google.android.syncadapter.calendar-1 and com.google.android.syncadapters.contacts-1) to system/priv-app
4- Reboot
5- Wait for Sync.