ON / OFF switch off after two days of use, low quality

My son offered her pocket money this little helicopter balloon-shaped. It's very playful. Unfortunately, the small flying ball does not react all the time with the remote control, so, she ends up falling floor. And thereafter, the ON / OFF switch is squarely back in the ball. In wanting out, he simply snapped. Poor quality in addition the seller asked me to return it to me but to pay the postage .... for a return to Germany and no guarantee to be reimbursed for anything afterwards. We are really disappointed and my son threw 14 Euros through the window.