My partner west mistakenly opened 1 heart vulnerable instead of 1 no trump with 12 points balanced, no 5 card major. I responded 1 spade with 6 points, and 4 spades to the 9. Partner passed, not having a rebid or a fit. After going 1 down, South complained that he was waiting for the rebid before deciding whether to enter the auction. Should anything happen following on from this?