Disappointing Customer Service

<p>After a change of bank account as a result of the death of my Dad, a double deduction was taken from my Mum's bank account on 1 November. I am still trying to get help with this refund. I have sent emails, I have spoken to the accounts department, sent copies of bank statements, spoken to the help desk to no avail. I'm not sure what else to do. Please assist with way forward.</p>