Non-consent of telemarketing

I signed up for Telkom and requested the 'no marketing' option. They proceeded to start telemarketing to my place of work. I have never given permission for my work details to be used. I have not given you permission to opt me into your telemarketing. This is a violation of POPIA and I want my details around telemarketing removed immediately. I request that any third party, to whom my data has been sold/passed, have my details removed from their database as well. This is unacceptable.