false advertising! battery life says 3-4 days battery life and i dont even get 24 hour battery life

I bought a polar A370 on the 30th September 2017 and was convinced i was getting my R2800 worth for it but NOT i should have bought the Fitbit that i initially wanted as they a respected true brand. My polar a370 needs charging every night no matter how littie the screen is on or one sync a day! please ppl go for Fitbit and not the inferior polar a370!