Incompitent call centre staff

It's been ongoing for the past 3 months that MBD collections department do not understand english or cannot type in proper messages. Their call centre people keep calling me for a Litiha Booyi, I. have told them on 10 occassions to remove my Cell number from this persons name.,yet again I get a message from Faith regarding payment. Faith I have spoken to on 3 occassions but she keeps calling my number altho I have been told it WILL BE REMOVED from this persons name.Get call centre staff who can do their job please.