Keep calling the wrong number

For the past 2 or so years, I've had to explain to the people, I assume from their debt collection department that my number does not belong to a Wilson Moyo and that I don't know such a person. I kept asking the consultants to please update their system to reflect this but yet early morning calls still come through.

I now put the phone down once I hear where they are calling from and block that number but still, I only have peace for a couple of weeks then they start again with a different number, this morning again, I was woken up by these irritations that keep looking for this damn person I have never heard off.

Imagine how much time and money have been spent looking for this person on the wrong number as either the company or the consultants are in denial that they were played as this person clearly gave them the wrong number and that calling me from different numbers won't change that.

I have had this number for just under 15 years and I would really not want to spend the next 15 years being irritated by African Bank.