Billed before installation took place

All my alarms have been installed by ADT and all previous experiences have been great.<br> <br> However....<br> <br> A sales consultant Larry came out in Feb 2015. I rented a flat and had an alarm installed in Feb 2014. Due to it being rental property you are not allowed to remove it. Decided to install a new alarm at the premises I am moving to. The new cost was R3561. Initial installation was scheduled for the 20 March.<br> On the 2 March a debit order goes off for R359 for radio linking fee & admin fee. Now, take note this alarm has not been installed yet.<br> On the 28 March a debit order of R3561 goes off. No alarm has been installed but I have now paid for the goods and paid for the radio linking fee.<br> Never previously has this happened.<br> <br> I am extremely disappointed in the service. How do you charge a customer for something they do not have?<br> This makes me feel like they are desperate for money.<br> <br> I have contacted them this morning as their accounts department still has not phoned me back.<br> <br> I have been to my bank to reverse the debit order.<br> <br> I have also cancelled the installation as I have no desire to proceed with it.