Brooks and Luyt Harassment

Good day,

Brooks and Luyt has wrong details for one of their Woolworths clients and are now harassing me on my work email. I've emailed them numerous times to let them know they have the incorrect details and that no one by that name is employed by our company, but they just ignore me. How can I get them to stop spamming my work email? the subject email address is *** and person they are looking for is Mrs. ROUX; ***