Good advice, I did the same thing through GE money and they were ruthless, got all my money back.Pretty simple Gav, do a claim through Visa or Mastercard etc and get your money back. Tell the finance people your story, and you will win no problem.
All you have to tell them was you did not receive what you paid for, they did not supply what you ordered.
The finance people don't care, you didn't get anything, so they want their money back.
Don't stress, but do it immediately, deal with it now, instead of sharing with us.