[Resolved]  Barclays Credit Card — harassment & false late fees statements

Dear sir/ madam,
I had barkclays card no [protected] which am not using presently.The reason being the amount of Rs 771 in the month of feb 08, which i paid by HSBC bank by cheque no.535187 dated 14/2/08 before the due date 15/2/08 and i myself depositted it in the drop box on 6/02/08 but they told me they havent received any cheque and they had sent a false sms stating that i had withdrawn cash amt of Rs 15000/which my husband and I clarified that we havent . after few days on 16 feb 08 they had called up to inform me that since i havent written PLC on the cheque so they are returning my cheque and asked me to write PlC along with barkclaycard which i wasnt aware nor it was made to my notice since before that we were paying them barlclaycard no .. so on asking them they said this was introduced after we had been issued the card lately and so i agreed and they asked me to send another cheque by their collection person Mr. Avinash Jagdale so as to avoid any late fees and so before i received my previous cheque i called Mr Avinash Jagdale same day and gave cheque no. 007004 of amt 771Rs dated 21/2/08 drawn on centurian bank of Punjab.but still barkclaycard people asking me to pay the same amount with their debit interestRs 747 + late fee 300and service tax . I am shocked by these people's behaviour .They are sending me statements, harassing me calling me late night and sending sms daily ...please help me to get rid of this case...i cannot pay the amount which i had already paid to them ... because i cant bear this injustice ...Today on this false debit amt they had increased by all means Rs 5 380.73 . Please guide me what step i must take .