NEVER USE Smartsurv Wireless - rip off artists

We had 2 tracking units on our taxis, which were subsequently sold. The details off the new owners were emailed to Vivian to contact them to take over the contracts. She never did until I followed up almost a month later. By this time it was too late as they had contracted other service providers. I then requested that the 1 unit be de-installed & re-installed immediately. They told me I had to wait 2 weeks if I wanted that done. I then said if that's the case, they need to put in a new unit & I would just continue with the rest of the contract. I accepted the quote of R1500 excl VAT, which is a ridiculous amount but nevertheless had to be paid in order to get a tracker in my brand new vehicle. I now receive an invoice for the new unit & another invoice for R610 for re installation! Daylight robbery. I told them I am not accepting the charge & they keep sending me the initial form I signed for the De & re-installation. Utter BS. Such pathetic customer service! I cannot wait for the contract to end so that I can move to another service provider who actually offers a better service than these con artists! NEVER USE SMARTSURV WIRELESS