Pathetic service ever

I connected ADT in July 2021 informing that the my alarm is not working and they assured me someone will come to check it however no one came. Then I decided to reverse Dr order for July and stopped further Dr orders for the following months. In Oct I sent them an email requesting for cancellation of my contract then out the blue I was treated like a worthy client and they send a technician to my house whom found faults with my alarm and replaced some parts. I then made an EFT payment for the month of Oct 2021 since I received some service from ADT however there where 2 instances whereby my alarm went off and I was called 1-2 hours from them to check if all is good. I sent them an email again requesting for cancellation of the contract as I'm not happy with their service(I mean calling 1-2 hours after the alarm trigged, what's the point??) Now they want me to pay for July-Sept services before I can cancel, how do I pay for something I reported as non-functioning and no one from ADT bored to check it out until I wanted to cancel my contract. Its clear ADT is just here to milk us without giving us any protection which we are expected to pay for. I want to take this further, If anyone can assist me with the right channels I have to follow please assist.