DSTV AND ITS BUSINESS PARTNERS

I am convinced that certain DSTV (Multichoice) partners are busy to sabotage our South African consumers which still have old fashioned decoders by bullying us to replace it with Exploras. With regular intervals, they trigger a re-boot on my decoder - mostly at peak viewing times. There is a Durban based company who has phoned me with regular intervals requesting me to purchase a decoder. How do they know that I have an old type of decoder and where did they obtain my contact details???? I have blocked some of these phone numbers on my phone but they still contact me from different telephone numbers. This morning I have received once again a phone call from Tel No ********** 412. If one Google this number it has a 78% negative rating and the comments of respondents are also expressing their utter frustration in receiving phone calls from this company. I believe that this is a highly ********* business practice which must be stopped immediately in terms of the regulations governed by the Consumer Act. Is there anyone with the required legal background who is prepared to take on this company ?