Spamming by REVCO over a non existing debt with the SABC

I have received countless emails from them about an outstanding SABC licence fee. The Licence Number is not mine. I have contacted the SABC and they confirm that I owe them nothing. I have emailed REVCO but they do not respond. I have phoned them and either the phone is not answered or when I did get through, I was told that the author of email does not receive phone calls.