Bad customer service from Netstar

I contacted Netstar for a tracking device last week. We agreed to a three year contract on Friday. They promised to call and make arrangements for installation of a tracking device. Since Friday they have not contacted me. I had contacted them yesterday to make follow-ups with installation of the tracking device. However, they are just sending me from pillar to post. The start part is that I have already agreed to a three year contract and my insurance requires installation of a tracking device. At the moment I do not have a tracking device and I am not covered for theft and high jacking even though I have agreed a three year contract with NetStar. If anything happens to my car I am on my own. The worst part is that I am not in a position to join another tracking company because I cannot afford to have two tracking devices. I feel so defeated because I have to use my airtime calling Netstar to do their job.