Hi Jimbob4, thanks for getting in touch.
As far as we're aware here what you're requesting is possible - I understand it's just refunds that we can't provide from Pay As You Go.
Unfortunately we can't help set up a Pay Monthly account from here as enlli helpfully suggested above our sales team on 0800 052 0238 can assist with that. If you have any issues moving the credit over though please let us know.
Tom