Paying for an ABSENT device

I bought a LG G4 less than 6months ago. The lens of the back camera stopped focusing and the phone had to go for repairs. Today, 21days later it came back with black marks in the lens again. It now have to go back for repairs. I have to pay for 2months without having use of the phone. I am very disappointed in the bad service I received, coz I was first sent to Canal Walk LG to waste my time, petrol and energy because that staff could not understand why I brought the phone to them, Lyle told me to take the device there. I was patient enough and I feel that I am taken advantage of. I work shifts and need to juggle my sleep between going to that store and being sent around for nonsense. I want to know how they can call this customer service?