You keep debiting my account after I have cancelled!

You keep debiting my account after I have cancelled!

I converted my contract to prepaid in December 2019. It is now April 2020 and you are still debiting my account!

I have made contact with you numerous times but your support is terrible and it is near impossible to reach a person in the accounts or cancellations department.

I have received feedback in February where the person apologised and said they would escalate it but it's still happening. My reference number for that interaction is ***

I have left the country so no longer use the number actively and only wanted to keep it on prepaid to receive sms's.

I am very concerned that you have probably gone and blacklisted me for reversing the debit order - but this is due to your inability to process my cancellation. I would like confirmation that you have cancelled and confirmation that you have not blacklisted me due to your faults.