RBL Bank — bajaj finserv rbl bank supercard

When I went to RBL bank with the problem, they sent me bajaj finance office and when I went there one person saw my credit card statement and dialed number to some customer care through his mobile and asked me tell the problem. I said that person that I did not receive any credit card but still getting statements and threatening calls. He asked my details and said that since I do not used the card the card will be cancelled and I need not pay anything. I got a mail stating that my card is cancelled and account is closed permanently.. I was happy seeing the mail that my problem got solved. But unfortunately it is not.. I am getting due payment messages very often.. I do not even know it is bajaj finance or rbl. Messages are haunting me.. when will get rid of. Please help me.