Horrible Service & Misleading Information

I have been using the HDFC Bank FOREXplus Prepaid card from Dec 09 in UK, I require a hard copy of the prepaid card statement for my dependent's VISA and need to submit the same to the UK home office, from the 20th of March onwards I have repeatedly called up HDFC bank from UK and spent a lot of money to just request a statement, each and every time they advise me that the statement will be mailed within 10 working days, but till date the statement has not been delivered at the address, all attempts to contact them in this regard has been in vain, they never provide me with the tracking number or any mail reference number, I would like to register a former complaint against:
Prepaid Cards - Dept.
HDFC Bank Ltd
Chennai - 600 107
For unprofessional conduct, misleading information and not delivering and processing customer requests.
The card statement is very important to me as this is one of the most important documents required for my dependent's VISA.