We decided to telephone RSI again and, hey voila, we are on their system but they are waiting for the final piece of the jigsaw puzzle and then we will be able to pay online. I quote "it's not your fault, the fault is this end" So once again we wait. For anyone with the same problem and needing reassurance, the number to phone is 0821 74 26 26. Thank you to those who replied to this thread, it was much appreciated.