requesting payments.

I was working for the edcon group and I resigned last year in February.<br> I had a stuff account which I settled and closed in may 2015, also received conformation from edgars that I no longer owe them. almost every week I get a call and sms's (that legal action will be taken) from vvm requesting me to pay my edgars account when I don't owe edgars. I went to edgars and checked again last month and according to their records I don't owe anything.. when I advise vvm what edgars told me, they told me that im still owing.