Tevo shox sentinel drone loses signal and fly's off on its own while using it.

I've recently purchased a shox sentinel drone, on the 11/11/2018 from the makro springfield store. I only used it 3 time's, and on the 3rd time flying at a height of 25-30m (they claim it has a 100m range) the drone loses single with the remote and decides to ascend and fly off on its own. I manged to locate the drone and returned it on 18/11/2018. "I've only had it for 1 week" and wanted a full refund or a credit note. The tevo manager at the makro springfield branch refused with arrogance and said that he cannot accept this product and didn't even want to book it in for assessment, until the supervisor from the returns department in makro decided to book it in. I received an sms today saying that I needed to fetch the item. When i called the store they said there's no fault and they cannot refund me. How can I accept an item that fails in less than one week knowing I didn't damage it?

I'm absolutely disgusted with the quality of this product. It claims it has a 100m range but loses signal when you're not even 40% into the range. It also claims that it has a 20 min battery life but dies within 10 min.

I'm not the only person that experienced this problem.

I advise anyone that's purchasing a drone to never consider tevo shox drones. If the quality doesn't disgust you, the customer care will.