so, the final chapter in this! the surveyor appealed the ombudsman's decision so the whole thing was looked into again. The outcome ended up exactly the same and the surveyor was given 28 days to pay. Those 28 days expired and i contacted the ombudsman again who gave him a further 7 days. a week later he hadn't paid. spoke to ombudsman again and they said the next step is they'll report him to RICS. the next day an email from the surveyor was waiting for me asking for bank details.
Money was transfered that day!