Rewards Co on behalf of MTN

I just received a call from Rewards Co on behalf of MTN, I advise the lady Sindiswa or Sindile that I am in a meeting and she laughed and said what nonsense am I saying because my son answered the phone. I asked her if she is aware that some people still work from home and she kept on being rude and forcing me to speak a Nguni language which I don't even understand. I don't have a deal with Rewards Co nor MTN to be entertaining such nonsense. Teach your people soft skills and ask them to watch the news and make it a norm as I have been working from home post lockdown as an educated individual, I do not need to be in the office to make sales like her. If needed I can even teach her a thing or two so she can get a better job. Stop calling me and please remove my number from your base