Harassing calls by Desperate business practice Markhams store

I don't have account with them but they keep on calling me each and every 20 minutes asking to speak to karabo banda I even call their supervisor last year and ask her to remove my number from their system I am not that person just imagine how traumatizing is to be harrast by calls and you keep on explaining one thing each and every 20minutes in your life. It is their *********** not yo use verifying opt when opening clients account to check if the number they are given is correct now they are becoming useless and desparete for collecting debt by calling wrong people even ignoring that fact that the person they call is not a client to then PLEASE STOP HARASSING ME with your non stop calls.