Notifications Late + Google downloads pending

Hey guys.. So i really really really really really REALLY hope anyone of you can helpme find the problen because i cant anymoe its so annoying.. Since i bought this phone (for few months) ive been experiencing 2 things who piss me off so much and again i hope you help me find the reason.. BASICALLY when I want to install apps , It can take hours before it start downloading , but what I noticed is that apps start downloading at the same time Gmail send me Mail Notifications, here what i tried :
Factory Reset
Uninstall Google Play Updates/Reinstall
Clear Google Service/Play Cache/Datas
Remove Google Accounts
Look if I have Free Storage

And Also the other thing who pisses me off is that I get my notification late or kik, sometimes I dont get them.

Hope u can help me please ..

My phone details btw:
Asus Zenfone 3 Max
Android 7.0
2GB of Ram