Shaha Finlease — Credit Card harassment

I m receiving call from shah finlease from last 15 days. They asked me to pay dues of credit card of Standard Chrtered bank. I am 61 years old and I m not remembering all this because they are asking dues of the year 2002. I have filed complaint against them in Police Station but still they are harassing me and my family. I told them send me legal notice I will reply. but he is not sending me notice but calling to my neighbours also,
I have read so many same complaints against shah finelase. Why they are harassing senior citizen like me. ? Kindly stop all this nuisance. Follow the RBI rules and regulation.
They are calling me from different numbers and if i ignore the phone then called my neighbours which is not at all allowed to them.
If all this reading Shah Finlease CEO or Head kidly stop them