Terrible service no customer etiques

im extremely appauled by the service I have received from cartrack, I called last week Tuesday (27 August 2019) to book an installation for Saturday 31 August 2019 I have advised them the reason for me booking on that day, after them agreeing on Saturday I wait and wait and wait for them and nobody is coming so around 10 am I call them to find out whats going on a lady by the name of Lerato answer the call and says she will find out n call me back, she than calls me back and advise me that the installer wont make it, I ask can they ask someone else to come she puts me through to installation where is speak to a guy by the name of Innocent I explain to him why it cant be installed during the week and he promises to get someone to install it for me and will call me back with details to date im still awaiting that call from Innocent.