Samsung gear

Bought a gear 2 watch and was told told would work with android 4.3 higher and 1.5ghz processor. After buying a J5 it did not work. Called Samsung they said it should and we need to take it to walk in center which we did. 4 hours later they still could not get it to work and said we need a s- series phone. Which we then bought a s5 mini. That was too small went to Vodacom and got an Samsung A7 and now this one is two weeks old the battery is only lasting 6 hours and we are told by Vodacom chatz to take it to Vodacom customer care. This is such an irritation with samsung's products. Why is this such a mission to get the gear to work. We buy these phones outright and it is money after bad. To top it all the IT Technician at Vodacom Chatz tells us we need to wake up in the middle of the night to take the phone off charge. REALLY! I would appreciate a proper Samsung representative to call me!