Unwanted Unsolicited Email from Mccarthy Kunene

I started receiving unwanted emails from Mccarthy Kunene, Venehee Ramsammy about 6 months ago. I haven't had a Mercedes in more than 2 years and haven't received any mails until 6 months ago. As there is no OPT OUT option on the mails I asked the sender politely to please stop. I have since done this monthly. Apparently he/she can't read