UK Car Repair Questions? Ask a Mechanic for Answers ASAP
I am sorry that you have not been helped yet. I just came online and saw your question.
Hopefully you have resolved the issue but if not, you can usually open the fuel filler door with a credit card or a putty knife by slipping it between the door and the body and prying the door back and then out.
For a permanent fix, I will need the last 8 of the vin number to pull the schematics.