Refund my money hard earned please, as I'm of no value to Netstar

I purchased a tracking device in November via a car dealership. Tried to secure fitment to no avail, as Netstar do not answer calls or emails. At one stage Frances was supposed to call me back, am still waiting three months later. Had to get another service provider as I couldn't afford the risk. Since the beginning of January I have been requesting refund but I have been sent from pillar to post. Netstar, please refund my hard earned money, I am no longer interested in doing business with you as you have shown that I am not important enough.