Hi
If you were minded, you could submit a complaint to the RAC about the handling of the renewal and advise them you will be contacting the FSA if you do not receive a satisfactory response.
The FSA may be concerned by the issues with the RAC's IT system and the processes in place. They could look into this the next time, they are due an audit.
The RAC may perhaps decide to send you the £30 M&S vouchers as a gesture of good will.
Huckster