Threats from nedbank but I'm not in arrears

I keep getting sms and recorded phone calls from Nedbank saying that I'm in bad arrears and a letter of demand has been sent to me but my 1 loan I have with them is up to date.

I called the number provided and gave the reference and it's for a completely different person, who I happen to know but has never used my number, so now I know that this person is behind on their accounts without even trying to find that info out. I have been told that my number was removed from the persons details but I still get the calls, it's been 6 or 7 times this morning while I am trying to work!!!!!

I really wish I didn't have this loan with Nedbank and I am not going to be doing any further business with them, you can't keep calling me while I'm working and it's not even for my own account!

I'm on the verge of swearing whoever I get on the line out!

Horrible, and I should try and get hold of the person who they are actually trying to get hold of and tell them that Nedbank keeps calling me and smsing me because they are apparently in debt!