Request for account closure but still billing me

It has been more than two months since sending documentation - as per your process indicated - requesting account closure on ***. No response received and you still billing me for a service I no longer require or am using. Every time I call the call centre some impolite person drops the phone on me preventing me even receiving a reference number. You are quick to sign us up but refuse us service or time of day went we want anything else. You *****ing me on my personal account that you still have not sorted after four months and now you doing the same on my business account.