Thanks for posting on the Community Forum and sorry to hear about this.
Generally, when you request a confirmation code, it will show on your bank statement within 2-3 working days. If you're still not seeing it, you can re-request that it be sent by following the steps below:
Select the desired bank account and click Confirm.
Click Continue, and review and submit the Direct Debit details. (If the bank account is a business account or more than one person is required to authorise debits, you must print and sign a paper Bank Funding Instruction and post it to the address provided.)
If you continue to experience issues, I would advise contacting Customer Support directly for further assistance. Thanks in advance!