Barclays Plc Credit Card — Stop Ruining my credit Worthiness

Address:

Hyderabad, Andhra Pradesh

Am Shadrach Samuel A Barclay Credit card user with credit card# [protected].I have made 2 cash payments on[protected] One for 15000 with Receipt # 1425074 and another one for 1525 Receipt# 1425075
Issues:
1)my due date was[protected]
2) I paid the whole balance on the credit card and got the confirmation from the customer care stating there is no balance to be paid towards the credit card.
3)Received the confirmation of both Payments From Barclays Via SMS on[protected]
4)On 29/07/2010 There was a cheque for 16521.27 was Presented and it was dishonored

5)* If the payment was Received by barclays 15days before the due date why was the the cheque presented .the customer service asks me to cancel Ecs by sending an email to ahalya.[protected]@barclay.com
date Sat, Oct 17, 2009 at 1:56 PM
subject ECS cancellation and did not get any response till now .barclays voilate Privacy of the customer ,use Profaniyty over the calls Somebody please protect me from this Loot