Not good customer service.

Good day. I bought a solar light on Saterday 26 June. I tested it and it charged and switched on, but I never tested it on battery only. I took the whole Saterday to install the panel and cable on the roof and light to the wall. Today I realized the light is not working on battery only. I tried to return it hoping that I could only exchange the light as everything was fixed to my house alreadg. I just received a straight answer of "no", they want everything including the roll bolts, bracket and panel that's already installed. There's no understanding or customer service at this place. Now I need to spend all my time again removing everything because they sold faulty equipment. I do understand policy but they could have treated it better with better attitudes. I will remove everything again, but would like my money back so that I can buy somewhere where I can at least receive better customer service.