VVM refuses to do their part

I have been handed over to VVM Attorneys by Nedbank recently. They keep on phoning me, telling me that I should pay. I keep on requesting that they send their banking details as I cannot make a payment if I do not have that information. They keep on promising that they will send the bank details. However, after this has happened numerous times, they still have not send me the details. I am at my wits end. At this point, I view this as harassment as VVM keeps on phoning me without doing their part as they constantly promise they will.

But I must also say that in a way, I blame Nedbank, as they are the company that exposes their clients to this sort of harassment. I see myself as a Nedbank client, not a VVM client.

I just hope that this review will assist, as I have no idea what else to do anymore.