Stinking service

I have informed them to cancel the insurance since I bought a second car and can't afford to pay two insurances.for some months there were no deductions.last month they decided to debit my account. I have sent two emails to their dispute resolutions.to date no response they just showed the middle finger. I have asked that they refund my premiums so it loos like they are forcing me to have cover with them. Can I please my money back!!