ICICI Bank — billing after settlement twice

This bank has billed me credit card bill from the pervious credit card number which is already cancelled. I thought it was a fraud. Then i talked to them they said no you hav to pay. So i paid first settlement amout of rs 5000 on april 2017 then after first installment they never turn up. Again i get a call from icici on june to pay the bill then again they settled on 10, 000. Again i paid 5000 and again for the next payment they never called or any info. I was been harrashed by this people. Please help me...[protected]