MTN spam to Vodacom Contract number

For about 2 months, I have been receiving both telephone and SMS spam from MTNYello. I ported my number to Vodacom more than 6 years ago and have had nothing to do with MTN since then.<br> The phone calls always come from an unknown number and each time I get the same blurb. I even had a call center agent tell me I was rude because I said I was not interested when she started her \MTNYello script". Another one argued with me when I told her I'm not with MTN (she told me I am with MTN) - trying to sell me airtime. Then the smses - usually telling me I can win something by buying MTN airtime or data. The latest one today is a Merc A200.<br> I am not an MTN customer and have not been for 6 years. Even when I was"