Faulty drone

I bought a drone from Homemark The glen, they said there is a 10 day money back guarantee or we are entitled to a replacement for any manufacturing defect. This is also stated on their return policy placed inside the drone box. I went back within 5 days and told them the drone is faulty, the battery does not last longer than 5 minutes. They refused to replace the drone or even look at it, they gave me another second hand battery and said that's all they giving me. This battery also does not last more than 5 minutes, I am sure there is something wrong with the wiring on the actual drone and I want it to be replaced as it states in the consumer protection act. I am disgusted with the service I got today! Extremely unhappy customer!