Sending SMS to wrongful person

I don't know how my number got onto your system but I have been getting SMS's for an unpaid AMPATH account that I am not even the person you are trying to get a hold of. I have phoned your offices a couple of times in the past few months to go through the process of giving the reference on the SMS and confirming that I am in fact not the person as per the account but I keep getting SMS's for the same damn account being unpaid. This is harassment. I do not owe Vericred / AMPATH anything but I am still being sent the SMS's for collection of a debt that is not even my own.

I need you to remove my number from your system for this case as I am seriously going to start looking into making a case of harassment through the Information Regulator as per the POPI Act as I do not know how my number ended up on your system for a completely different person.

I want this sorted out asap or I will be lodging a formal complaint with the Information Regulator as to how my contact information and another person's contact information has been mixed up and that my details have not been taken off the system after phoning on my own expense to rectify your mistake.

The reference in question is: ***