Unpaid wages.

Hi all, need some info and a bit of help.
In the week leading up to the New Years Eve (week ending the 2nd Jan). I was given a bank holiday the 27th and was given a bank Holiday owed for the Tues, worked 6hours on the Weds and 7 hours on the Thursday and Friday. Apparently they worked off the wrong roster(week ending 26th), everyone's wages were effected either overpaid or underpaid. I was paid for 24 hours holiday which is wrong first of all since it should only be about 16. Anyway, two wage packages have passed and no sign of money owed. My Dept manager said that the accounts dept are saying I am not owed anything. My wages aren't hectic but this is alot of money for me. Am I due these wages? I m pretty certain I am. What route should I take with this?
Thanks

There were 3 bank holidays :
1. Christmas Day
2. Stephens Day
3. New Years Day

To qualify for Bank Holiday pay , you must work 40 hours in previous 5 weeks .

So you holiday pay of 24 hours seems to be correct .

Cheers thanks for at clearing the holiday pay issue. At least I know where I stand with that. Any ideas about the days I actually worked? Are these owed to me?

As you obviously worked Weds , Thurs , and Fri 29,30, and 31st Dec ( a total of 20 hours ) you should have been paid for those days the following week .

Thanks allthedoyles. I know i must sound like an awful ape asking questions that have obvious answers just needed reassurance that i was right.