query for defunctional toy bike

I bought an electronic kiddies quad bike from the groupon website.for my daughter's third birthday. I assembled it,and plugged it in to charge.I tested it after an hour or so...lights were flashing only,and it made a small sound.So I left it in to charge overnight.I tried putting it on again,the lights flashed a little,but this time no movement at all.I let it lie,because I thought perhaps my electrical adaptor was not giving it a chance to charge up properly,seeing that the bike has a battery which needs charging.<br> Eventually roughly 8 weeks later,I file a complaint with groupon,who supp**** me with the company's details,citing that the company handle their own customer complaints.I sent a direct email to the help desk,and was contacted by a gentleman who tried to help me,by asking me to check wiring and assembly of the toy,I tried to recharge it after all the wires were correctly secured,still only lights come on,and it doesn't move at all.Its never been used since purchase,and the company is expecting me to courier it back to Gauteng at my cost.I have sent repeated emails of which I have proof,but am being given excuses,that the manager is in a meeting.