Customer service is a joke

I have sent a request to customer service on the 10th of July asking you please change banking details from which you are currently debiting for my service plan. I sent a follow up request again on the 17th to Dolly, and nothing still, this is too difficult a task for you, please can you cancel my policy with immediate effect and refund premiums due to me, I will be valuable elsewhere you have too many clients to sustain you. Thank you