DramaWave Continued Charging After Cancellation – £30 Refund Request

I had a paid subscription with Dramawave, which I cancelled on 30 August. Despite cancelling the subscription, Dramawave has continued to take money from my account without my consent. In total, around £30 has been taken from my Nationwide bank account after the cancellation date. I have tried to contact Dramawave customer service about these ongoing charges, but I have only been given the runaround and have not received a clear or satisfying solution. I request that all amounts taken from my account after 30 August be fully refunded and that my subscription be completely cancelled so that no further payments are taken. I also expect written confirmation that my account has been closed and the charges have been reversed.