GE Cash Card
Harassing Collection Calls after full payment

I used GE Money Cash Card for more than 5 years now.

My card Number is 4211892016247360.

I discontinued services this card in July and asked them to furnish a letter of discontinuation after paying full amount on the bill.

They furnished this letter on my continuous follow up in the month of October.

How ever They still ask me to pay Rs 1000 saying my outstanding balance of Rs 250 with penalties is summed up to 1000. I explained them the fact many times but their abusive calls are never ending.

Is ther a way to get rid of these abusive calls?

I want to register a formal complaint aginst this company for approaching me with indecent telecallers that use irritating tone and words and threaten to collect money.

Please let me know how can i take a step against them.