RBL Bank — Credit card due

Address:

Mumbai City, Maharashtra, 400072

Respected sir
I Have been received a massage to pay due of Rs 1148.85 dated 5/5/2017 and mentioned I will receive a bill within 7 days but I didn't received any credit cards from your bank and your telling me to pay this I cannot understand whats going on and I had already send a massage to bajaj finserve to return the documents which was issued from me which was taken from bajaj finserve representative whats all about explain me breifly are I am been cheated I want a correct explanation it's very important for me to take a legal action so provide me all the information immediately thanking you kindly.