******* collections from Cartrack and their legal firm

I have been with cartrack since 2014, last year September I changed cars, I called to cancel and took responsibility for 1 month payment for late cancellation, them reading out their script and jargons, I couldn't understand what it meant, asked for rephrase but still couldn't get it, only to find out according to them I was agreeing to pay 2 months even when I was not in need of their service and the car gone, They have been calling, different people always and taken me to legal, then on the 17th June an agreement to pay 139.15 was reached and I paid 25 June, to date I still get watsapp, calls, sms from different legal collections firm for this.... What the Hell!!!!!!!