EVERYDAY Debt calls to non account holder

Every Morning at 7am I get a call from *** (AFRICAN BANK COLLECTIONS CENTRE) asking for a Ntombikayise Rose Mntuntaa. A person I do not know and have expressed countless times even when they continue to call through out the day - EVERYDAY. I have asked every single time an agent calls to be removed from their system and even though they reassure me they will be doing it I STILL get the phone calls at a frequency of every 1 to 2 hours asking for this person! I Just got a call now whilst typing this report! I work till the early hours of the morning only getting to bed in the am and this is VERY disruptive to my sleep pattern as the phone wakes me up like clockwork 7am. Please stop calling me African Bank - I do not have any accounts with you and I certainly do not know this person!