Default On Credit Report

RyJ1986

Upon recently checking my credit file I noticed that I had numerous defaults served against me from a particular bank - One for a Credit Card, one for an overdraft and the other for a personal loan.
I am aware that I failed to make payments as agreed as I lost my previous job, however, I never recall receiving any prior warning of a default being served against me..
I wrote to the bank asking them for a copy of the original notice asking them to substantiate this as I did not receive it and they have replied with a letter confirming that
"the default notice was sent in June 2008 to your address. The bank considers that this notice was served in accordance with the requirements of Section 176(2( of the Consumer Credit Act. - The Default Document is a system generated so we are unable to reproduce it and supply you with a copy of the original notice"
Is the bank allowed to do this and would it be possible for me to fight this decision to have the default removed? Surely the bank would have to keep copies of its system produced letters and have to supply me with a copy to substantiate the Default??
Thanks all