Taken for a ride by the Post Office when I insured my motorcycle

It cancelled my policy then sent me a bill in a postcode lotteryI accepted a quote from the Post Office to insure my motorcycle. A few days after I’d paid the premium, I received a letter telling me that the cover had been cancelled because I keep the bike in my father’s garage during winter, and on my drive in better weather. The two houses are less than a quarter of a mile apart, but the fact that they bear different postcodes made this unacceptable. I was offered an alternative (at nearly