Standard Chartered Bank — Unwarranted charges and refusal to redeem credit points

Dear Sir/Madam, This is with regard to my credit card no.[protected]. In the month of July my transaction value was 61, 329.29 and around 25th or 26th Standard Chartered executive from EMI section contacted me for using EMI option for six months. She told me in case I wish to make early payment there will not be preclosure charges and interest will be levied only for the period o[censored]se. I opted for this option. The bill got generated on 4th Aug and since I had the funds so I made full payment of 61, 329.29 on 6th Aug well before due date of 22nd Aug. I called the customer service that I dont wish to use EMI and requests them there should not be any interest and preclosure charges as per the information given by the EMI section executive. But they charges me 1510.75 on account of late payment charges and some overlimit charges I dont know why. Then as per my requests they cancelled my card on 17th Aug and after that series of email exchanged on the subject for reversal of these charges and activation of my card but to no avail. Then next month they charged me late payment charges my bill starts increasing and giving me stress of not resolving the issue. The final bill amount became 1900+ then they reversed some of the charges. Finally to come out of this situation I made full and final payment of 1071.27. Harrassment doesnot end here, now I thought of atleast redeeming my credit points which were 11148, they refused to redeem these points by saying it should have been done before cancellation of card. Sir, please help me getting this grievance reddressed as I suffered a lot over the past two months and ends up in paying 1071.27 without having any fault at my end and also not able to redeem my points. Even I requested them to reactivate my card as i paid the uncalled for charges of 1071.27 but they said it can not be done after one of cancellation. Please help me by your best advice and so that I can get just & fair treatment in this case. Let me know in case you require any other information from my side.