Harassing Non-stop loan offer calls I did not apply for!

Within 1 hour alone I have received 7 Harassing calls insisting I take a loan???? I did not ask for a loan, i did not apply to anything African Bank related, I did not provide you with my contact details and no one said it is ethical to call me so many times for something I DID NOT ASK FOR! Changing numbers ever call so i wouldn't know who it is. If you were hoping I'd be a customer ever, well that ship has sailed. Stop with your ********* practices.