USELESS IN CANCELATION OF CONTRACT!!!!!!!!!!!!

I would rather rate them minus 5, as 1 is still to much for them! I have been struggling since April 2021, to cancel my contract with them, due to poor service delivery! I have send numerous emails and phoned the call center a dozen of times. How can you not get the picture that I gave notice in writing to cancel my contract. Still I'm receiving emails, showing that I'm behind on my account. Clearly, they can't handle a simple cancelation!! They are just out, to take more money from us the consumers, than to provide a service to protect our properties!! I have disconnected my alarm since April 2021, and NOT once have they phoned me, to ask if something is wrong!