We need security to protect us from ADT security!

I have 2 complaints. 1. I cancelled my contract with ADT, yet they still deducted a premium at the end of the notice month. This is incorrect, as my contract clearly states that premiums are paid in advance. 2. They sent a "technician" 4 days after I advised them there is a problem with the alarm system. He told me the system blew and it will cost me almost R10 000 to replace. I got the technician from another security company, who replaced a fuse and had my system up and running immediately Afterwards I heard the technicians get commission on up-sales - so they are not there to help you anymore. Just themselves.