Pathetic service and unauthorised debit orders

After Auto and General called me on 26/01/2018, they sent me a vehicle insurance policy document with a higher monthly premium than I had agreed upon telephonically. Immediately, I responded asking them to cancel my the policy which was only due to start on 01/03/2018. Instead of cancelling, they sent me an updated policy with the correct premium. On 29/01/2018 they called me and I asked them to cancel my policy before it started due to affordability. Instead they put me through to an agent who sent me an updated quote and told me I had up to 28/02/2018 to accept the quote. On 26/02/2018 I sent a mail explicitly asking Auto and General to confirm that no policies were active and to cancel them if any were. Up to today (06/03/2018) I have not had a single response from them even after sending follow up a follow up mail on 28/02/2018. Auto and General then proceeded to debit my account on 01/03/2018 but the bank returned the debit order and additionally charged me a fee for this unauthorised deduction. I immediately sent another mail to Auto and General expressing my dissappointment and asking them not to put through any further deductions as they had no right to. I have never even once received a response from them up to today on the matter and then all of a sudden today I got an sms from them saying my debit order had been returned and they would debit my account again on 16/03/2018 and additionally charge a fee. How unbelievable is that? They have absolutely NO RIGHT to do so and in actual fact should pay the fees the bank charged me for their first debit order attempt. I am absolutely disgusted at the poor service and the predator nature of this company who lures you in and then don't care enough to even respond to you once they believe they have trapped you in their snares.