Shocking Service from Cartrack - do not use them

I am utterly disappointed with the service received. I have been a loyal client for years now and in the last few weeks I have found their service absolutely shocking - please look at any other car retrieval service! Firstly when you call them expect to be hung up on, it happens that every time myself or my husband call their call centre the call drops at some point and this is regardless of our signal when calling them. A few weeks ago i got an sms to go and load the new app. I went and did so and found my one car on the app and the other was not. Upon querying this i found my one car has too old a unit and i had to upgrade the unit- which is fair enough. Upon further questioning i found that i was being charged about R200 a month per car, but had none of the features to track my cars on the new app. However if i "upgraded" i would be charged the same and then get all the new features. No one from cartrack has ever contacted me to let me know that i can get more features without paying more, but they have been happily pocketing the cash and not giving me all the services that i should be receiving for the price i am paying. I then went and upgraded both units, which they have in turn charged me almost double my usual account for November which i was advised would not happen, and the one unit is not working at all!! My one car is showing to still be in the location they installed the unit even when we are 100kms away. I have phoned cartrack to ask them to come and check the unit, however i was told someone will phone me back. I have been waiting a week for this call. I then tried to call this morning and was placed on hold then hung up on 3 times, eventually i got hold of someone and they will come next week, fingers crossed it works this time. I am very disappointed that i re-signed a contract with them because so far it does not bode well for the service i will be receiving.