PROSECURE CHARGING FOR DEFECTIVE ALARM REFUSES TO CANCEL ACC

prosecure's sales person charged me for a new alarm system under a year ago, 4 months ago there was no signal from my home to them, they kept charging me for a service that did not exist, after numerous complaints and several emails to cancel they have ignored my emails since 17/05/23. they are well aware that there system is not working but continue to charge me for a service. they are now refusing to cancel my account. I paid the salesperson for the unit and installation WHO NO LONGER IS EMPLOYED AT THEIR COMPANY neither is the technician . this company should be investigated for their