"And my attempt at bluetooth connectivity for phone calls failed as the things could not stay sync'd during conversations. Better to just use a headset.
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And that is what you should use the money you paid for....getting proper follow up and adjustments, including making your BT work.
BT and hearing aids have been used for over 10 years.
Apply new firmware to the hearing aids.
help you set your phone to work properly.
Return them and use a different make/model that works with your phone.
It was a new iPhone SE and a new vendor (not Phonak which didn't BT). The sound was not as good as Phonak, and the BT worked much of the time but not reliably. This, of course, was not a problem for those wearing one aid - I have two. One pays a lot of money for promise which, honestly, isn't fully delivered.
And that is what you should use the money you paid for....getting proper follow up and adjustments, including making your BT work.
BT and hearing aids have been used for over 10 years.