Can't download /update apps from google play app store

Basically it all started with i couldn't use my apps as they needed updates but when i tried to update them it would say ' paused' on the download, so i factory reset my phone after trying everything google said, and now its let me unable to download any apps! i can't redownload my old ones or new ones, ive factory reset my phone, ive cleared the caches and restarted the download managaer and the store everything,

my phone is:

Model number: Kazam tornado 348
adriod version: 4.4.2
Kernel version 3.4.67

Welcome to Android Central! You didn't change your Google password as well, did you?

Also, did you clear cache/data from Google Services Framework? People do that sometimes, hoping it will fix things, but doing this can actually cause more problems.

Did you only Clear Cache from the Play Store and Download Manager, or did you also Clear Data?

I too have a Kazam Tornado, and I can't make any sense of the Google playstore - downloading 'pauses' having never (apparently) started. I've given up and used 'Aptoide' instead. It seems to work. I'm afraid that getting any help from Kazam hasnt been easy