Frustrating updates of Sleep times

I am registered for Vitality Sleep rewards, but Discovery is not updating my sleep time correct on a regular basis. It either misses a day or updates to a 12 hour sleep basis. This happens on a week ly basis causing me not to achieve a weekly cycle. I know this because the records on Health Connect is showing the correct daily data. I have called, recorded error, but nothing happens, is corrected. I is very frustrating battling every morning to achieve correct updates