I have a fenix 5 and its suddenly stopped syncing with my phone. the watch is connected but just wont accept the activity?

I've tried call garmin and still waiting on a call back!!

i have a Garmin Fenix 5 and it has stopped syncing with my phone, howevr it is connected by bluetooth!!

i've reset my phone and watch. i've removed app and reinstated i just cant get it to record the activity!! any one ouit there they can assist.

thanks

Shaun