Barclays bank Credit card
Unnecessary Charging of Late Fees

I have paid the full total oustanding amount of Rs 4, 853/- vide chq to Barclays Credit Card. But to mu utter surprise, they collect the chq late from their chq drop box location and delayed the amount to be credited to their.By doing this they levied late payment fees, deactivated the card and now their collection ageny, recovery agents and bank threatening to pay the charges (late fees, for which I am not responsible).