Call center agent swore at me

Constantly being called from DSTV salespeople. The always change the extension that they call from. TODAY WAS THE ULTIMATE WORSE! A sales lady called and I asked her to take me off the calling list and she literally started swearing at me in her home language which I don't understand! She then told me that she never spoke to me before and dropped the phone. I would never recommend DSTV to ANYONE and am personally glad I cancelled the service myself many years ago.