Nedbank harassing customers!!!!

I got a call from a Nedbank consultant informing me about a missed payment, which I acknowledged, and informed the caller that due to all the ****s happening around our country I would prefer not to discuss anything related to banking or money in general, over the phone. I would rather have them send me a message or email and I will go to my nearest branch to attend to whatever I would need to. But my efforts to explain how I do not want to be called fell into deaf ears because every single day, more than 20 times each day for the past 2 weeks, I have been getting these calls from Nedbank. This is now beginning to feel like what I would imagine harassment feels like. This must stop, I've had enough of this and obviously your telephone consultants are deaf or your management is blind because I've explained this to more than one person and each one keeps saying they will make a note yet these calls don't stop!!!