harassing their own clients

im considering closing thae account i opened a month back because wow, the harassment of calls from foschini offering airtime and data as well as legal cover after i told them i dont need these things. they call atleast 7times a day to offer me the same services i told them i dont need. im annoyed because i told them i dont need the services after the first 7 times they called me. yet they are still calling non stop. please remove my number from your marketing because i know for a fact i did not tick the marketing consent box.