MBD SABC harassment

Only given a 1 star rating because it is not possible to give a minus start rating. For over a month I have been harassed (at least a call every second day, including Saturdays, and after hours) by MBD's call centre over a SABC license. Despite having told numerous call centre agents that 1) I cancelled the license more than 10 years ago and 2) I no longer own the cc which had the license, they still keep calling and smsing. This despite having spoken to a call centre 'supervisor'. Clealry the call centre agents don't listen, take notes or escalate matters, even when requested to do so So MBD, again, its not my fault that SABC does not keep proper records. Please advise to which law society MBD belongs so that I can lodge a complaint of harassment and incompetence. Anyone know if ******** charges can be laid for harassment ?