Just as i read your reply i saw this in email :
"Your request to withdraw £65.40 from your balance has been successful. Once processed your account will be credited for the following sum £65.40 providing the details provided are correct. The process will take 10 working days to complete once the advertised window has closed. Please only check your balance after that time period has passed."
I misunderstood, looks like I have to wait until after the cash back window closes to receive my funds. This window closes May 2 , so I'll check back after May 16