Worst service from adt

ADT was suppose to come and install my alarm system on Thursday the 16th April 2015, i had taken unpaid leave to make sure i am home, because they had informed me that they do not do installation on Saturday. A lady from ADT called to say that the technician did not come that day, and that he would come on a Saturday. On Saturday i got a debit order for the Alarm installation, the agreement with the sales consultant was the 1st of May. I then called the call centre to ask them what was happening, they said the installation was set for that Day, but that they could not get hold of the Technician, hence they could not help me. I am angry because they took money from my account before the date that they agreed on (now i have to go to the bank to sort things out) I had taken unpaid leave to have my alarm installed and they never came, and agreed on another day, and again never pitched. I called my sales consultant, he said he would get back to me, but never bothered to call me back.