distressful service from Netstar tracking company

Shauns taxis have been with Netstar for more then 20 years and we are experiencing the worst service. our vehicles can not be tracked because the profleet tracking system is not showing most of the vehicles. for a taxi company it is essential to know where your vehicles are. we have a agent by the name of Gabriel and he cant do anything because he said the customer support will sort it out --they deal with the problems-- i would like someone higher up to please contact us about this ongoing problem. as a long time customer i think it is distressful the way this issue has been attended to. every time they say it is attended to but the problem still persist. we are considering going to another tracking company. we have been with them for so long but we can not have this problem anymore. if i could give 0 stars to Netstar i would do so please can someone contact us. Shauns taxis