Barclays Credit Card — Payment done not cleared through cheque

Hi,
I am one among the person who have been loyal to each of the department especially to credit card departments. Being a customer of Barclays Bank from about a year or so, everytime i had a bad experience with them in related to transactions and that too especially with the dues which i had already paid but still they are sending me messages, calling me at everytime. I am really pissed off with them. And the good thing is this i am been waked up by their pleasant message stating that

"We have not received last month's payment by the due date. If you haven't already done so, please pay Rs. 560 immediately. You may contact us on[protected].
Sender:
Barclays."

This payment which i had already done through cheque not only these 560 bugs rather more than that around 1000 or even 2000, isn't it shame on Barclay Bank. Either they should be taken out off this state or from the Country Itself. It is really useless bank and inturn bad customer service.

The other part of the story "I called up customer service, gave him all the information and did all verifications with them, While asking them about the same issue the even tell me the same thing that you have not done payment as we had not receive the payment, after having word with them when i provide all the information about the payment done through cheque by an intermediator "BSA LOGISTIC PVT. LTD" (as these are the persons who take responsiblity of collecting their payments due to any mode, this is one of the reasons why we people provide cheques instead cash) as what these people do with the cheques we even don't know, and what if we would've provided them with cash "IT WAS ALL LOST THEN ISN'T IT" man really pathetic service.

Really rubbish, shame on them.

So my question is that will there be anything done to this bank or not.

Bye.