Cartrack Bloemfontein POOR service

As owner of a business and Cartrack client for almost *years, we had 4 vehicles tracked devices to be canceled due to POOR services. On my account of the 4 vehicles, there is a credit that is with Cartrack for almost 6 months that needs to be payed out. Nothing happened so far. We installed a tracker device on a 5th vehicle on 1 Nov 2018 and I am being billed double for this specific unit, with no explanation. We received incomplete reports due to poor customer services . I will not advise anyone / businesses to install any Cartrack devises of units!!!!!