Step 1: To decline your response in 2.4. Select Decline & then Select Request More Info
Step 2: Then type in a response or what further info you need in the box and select Send
Step 3: The status reverts back to Awaiting Response
Step 4: The supplier completes and sends back. The status is at Requires Your Review
Step 5: Then refollow steps in 3.4 to confirm when you are happy.