You need to call Guide: Coronavirus Community Help and Support
Also take a look at this to see if the steps for activating wifi calling have been carried out
In Myo2 as you scroll down there is an a section that should say manage your account, under this header you may need to click "view all" you should see a section that says Your Device and under there Device connection, if yoiu click on that you should see the option for Wifi and 4G calling.
Hope that helps.
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