Last thing Phone up quinn insurance , they are an Irish company but do have one depot in Manchester , explain that you changed your bank detail and what date this was done, they will be able to check the phone records, hence they will be able to clear up the misunderstanding if they ask why you didn't check you bank to make sure it had been taken out (because it is your responsibility to do so) , tell them you did on the day it was due to come out but had given them a few days incase there was a delay because you had just changed details, and then you had forgotten about checking again (people make mistakes )