I'm getting a £2000 bonus from work for Christmas

The total amount equals around NZ$4600, but a good portion will go to tax and student loan and Kiwisaver. I've already budgeted $1300+ on Warhammer and clothes and shoes and Christmas gifts, and after my normal expenses come out and I pay off my credit card and overdraft, I should have around $1000 left hopefully to get me through those two weeks. I do need to put some money into my savings but I'll need to see how much I get in hand before figuring that part out.