On our recent home appraisal there were several inaccuracies, what can I do to get them corrected?

I live in florida and our recent appraisal came back way lower than the recent appraisals of several other homesin my subdivision even though our home has many upgrades the others do not have- my hubby is the project manager so I know the details of most of the homes built here. One of the comp homes used was valued at $15,000 more than mine even though they are based on the same florr plan and we upgraded with lots of extras. Because of this poor appraisal we can't refinance. I've emailed the appraiser with these omissions plus he had incorrect sales info on another comp property. Is there any other recourse?