Ring Doorbell pro

I have spent about 5 hours today trying to set up a Ring Pro 2 doorbell to my T- Mobile 5G Internet Gateway. The Ring device keeps telling me I have no internet connection - which of course I do. On elevating the issue with Ring technical support, they believe that T-Mobile is blocking the port which Ring uses because of the small print in the T-Mobile Terms and Conditions which says that their service may not be used for "applications which are designed for unattended use, automatic data feeds, automated machine-to-machine connections" which would seem to cover things like Ring and any other continuous home video monitoring. If this is the case I will have to cancel my T-Mobile internet service and go back to plain old cable. But I think T-Mobile (and Ring for that matter) should tell customers upfront that the two are incompatible