Faulty Samsung S5 Cell Phone Battery

Bought my Samsung S5 in Oct 2014. In Feb 2015 booked my phone in for repairs as phone freezed with snowy screen and hot battery. 2 weeks later phone returned and sovoftware only replaced. Back to store to query low battery readings in Mar 2015. Explained to Charl.....Manager and Vuyo that phone charged 100 % at night..unplugged and then in morning battery reading 15%. Vuyo booked phone in again...came back with report that read No faulty battery. Called Thelma at head office repairs who confirmed that the phone and battery was never forward to her department so that a PRODUCT SPECIALIST could attend to complaint. Went back to shop and spoke to Daniel on 19 Mar 2015 who immediately apologised and promised to order new battery for me. To date I'm still waiting...numerous times I called Daniel who cuckold me I to believing the battery is on backorder. Still waiting for my battery.