Delay in Refund of Credit Balance After Account Closure

Dear Virgin Media Customer Care,

I disconnected my Virgin Media services and returned all equipment, which your team has confirmed as received. My final bill shows a £42 credit balance, but I have not yet received the refund.

My Direct Debit is still active, so I expected the amount to be credited to my bank account automatically. Please confirm how long Virgin Media team will take to my refund to be processed.