Nedbank Harassment; Credit Card.

On the 11th of this month I spoke with Cristine Page, at Nedbank card, with regard to repayments of my Credit card. She promised to have a manager contact me. To date no one has. I am a pensioner in financial difficulty. A third of my payments go towards interest. I now receive calls from people claiming to be employees of the bank, credit card department; they phone me up to 7pm; the callers will only supply their first name, and will not let me speak with a manager. I also receive calls that when answered have no contact person who answers to my repeated, 'hello's'. I have repeated calls, from the same numbers, that ring for a few seconds and then stop ringing. Would a person at the bank with authority please contact me; one to assist with payments, and two with this harassment.