Give them a ring to say you want to claim your pension Matson. This is one government department with helpful, friendly people on the end of the line and they will take you through it.
They are paid four-weekly, not by the calendar month,and it is very nice when you get one on the 1st and another on the 29th! You can just ring the DWP but I usually put changes in writing.
I would think you could just phone them and ask for it to be changed, Lizzylou. However, you'll have to wait for four weeks until you get your first monthly payment.