Barclays Credit Card — help me out

Address:

Chandigarh, Chandigarh

Dear Sir
I am using Barclays credit card ([protected]) from last many years. I always make payment on time. You have declined my request of reversal.
The payment was of rs.1550. I made the payment on time through a cheque. Bank received the cheque on time. After 15 to 20 days, bank collection deppt called me up and asked me for the payment. I told him that i have already paid the amount and i also gave him the cheque number but he kept on refusing. I tried my best to convince him but he did not agree and started abusing me. At last i called on customer care, they told me that my account number is missing on the cheque. I immediately deposited the cheque in that month itself. Later i was charged late fee of rs.570. I asked them for reversal charges of late payment. They noted my complaint then i deposited the payment less by late fees.
In the next month, they charged rs. 170 as debit interest. Then again in the next month i paid the amount less by late fee and debit interest on time. Next month they again charged debit interest and now the total is rs.860.
I could have filled a complaint against the bank collection deptt because the way he dealed with me behind just an amount of rs.1550 was pathetic. Is it fair to charge an amount of rs.860 just because i forgot to write my account number on the cheque?
If no action is taken then i will have to stop using my barclays credit card. Hope to see a positive response.

Pardeep Kumar
Barclays credit card ([protected])