Cant hear callers on BT cl;oud voice express app

[tunnes]

When he phone rings on the app I can't hear the caller but the caller can hear me. This is same on two different Iphones. 

[BethM]

Hi tunnes

I'm sorry to hear you're having issues with the CVE app. Have you spoken to our CVE technical support team about this? You can find their details here: Contact Us | BT Business Contact Numbers | BT Business