Online shopping error

I've been trying to place an order to Dorothy Perkins site today and it just pisses me off because everytime i go to the check out page, i always keep on getting the same error result. I have tried different browser that i can think of and actually uses two different computer, but still no luck. I am dying to order some of the items on their website right now but it just makes me upset to think that i can't even place any order. If they really experiencing site problems, i hope it will be fix soon. I'm waiting on here.....