Hauwei Bands are *******

We purchased 3 Hauwei Band 6's roughly 2 and a half years back. On purchasing all 3 the first one starting giving issues and rebooting over and over. Which was then replaced and I upgraded my sons watch to the GT2. My wife's and daughters both packed up with exactly the same issues now I January. I complained to Hauwei whereby they tell me that there is no issues with the band 6. I disagree as how is it possible that all 3 watches had the same issues. My feeling is that the Hauwei bands are ******* and I would give anyone advice is not too purchase the bands. I know we can't afford purchasing new watches every 2 years as it starts getting costly.