No Response to Several Contact Attempts

Hi have been trying for days to reach someone via phone and email regarding a replacement charger for my son's Mudslinger GoSmart Explorer, to no avail. We have tried the store where we purchased the item and they do not provide chargers on their own. This is a high voltage charger so we can't just buy one over the internet. I have called several times and sent emails and nobody responds. This s****** is really expensive and is literally unusable without the charger. I just need someone to contact me and tell me where I can purchase a new charger. With this type of service, I really hope that other people don't waste their money on something so expensive that you can't keep running.