ADT handed me over for cancelling services!!!!!!

I am so disgusted with ADT. I cancelled the subscription with them Nov 2020. I received an email and calls from Norman Bissett attorneys for an outstanding amount of R1394????????? . ADT had the audacity to hand me over for cancelling services with them and I have been with them for almost 10 years shocking!!!!!. I cancelled due to their fees being too expensive and when I was by the means would have resumed their services. Not after this despicable experience. They wanted to tarnish my credit profile ridiculous. Thats how they repay me for being loyal for 9 years. all my friends and family have cancelled their services as this is unaccepatable.