5 to 7 working days.

Overpayment of Loan account. Phone the call centre and get sent to the correct people and I get informed that they will need a bank statement to confirm banking details o s a refund, but this will take 5 to 7 working days. Great, off to the bank, get the stamped bank statement and send it through. I spoke to them again on Monday the 9th, the lady confirmed that all was received and instruction for the refund was given through on the 9th. Today is the 7th workday and still no refund was made. Phoned them again today, and there answer is, there is an admin issue. So please do inform me as to what the admin issue is?!