How can a community meet the housing needs of it's citizens when City Hall disregard the rules?

We purchased our lots in Greenwood in 2015. The previous owner of the property was granted approval for a subdivision from a larger 1 acre property in 2012 creating two additional lots with the sewer line coming off an existing sewer main on the street at the front lot line. The property was listed as serviced. We were expecting the sewer to be made available; however the City of Greenwood refused to honor the approval and insisted on a different proposal with all sorts of unforeseen costs and other impacts. After putting a sewer in to the new location that the CAO insisted on, and after tracking down the subdivision file that City staff conveniently lost, to our horror, we discovered the location the sewer is now connected was rejected as part of the original subdivision approval because this location is in a flood plain and subject to annual flooding. We made several attempts in the last five years to deal with the city to resolve this unhealthy mess they created, but they refuse to speak with us, conduct a site visit, as well Council refused to meet with us to see what can be done to remedy the mess they created and insist we deal with the CAO who in turn refused to speak with us or provide any information. We are quite used to buck passing after five years of going to various provincial ministries to seek help with this mess. What we learned though this five year ordeal was that the Province supports local government's ability to make decisions in the best interest of the community, and municipalities are to ensure that their processes conform to principles of good practice and legal requirements. When a municipality fails to comply with basic due diligence standards, their is no mechanism in place to address such deficiencies. Because local governments are given so much autonomy, it is assumed due diligence will be exercise. When Council does not make themselves accountable or available to the citizens, or Council does not provide adequate oversight then there should be a mechanism for taxpayers when errors are made, or negligence or will misconduct occurs that impact on citizens health, safety as well as impacting on housing. Unfortunately, it would appear that there is no compliance enforcement on municipalities by provincial authorities, and there is no provincial appeal mechanism for local government decisions, whether legal or not legal. Citizens have no independent provincial body other than the Office of the Ombudsperson, or to make application to the Court to determine if the municipality is acting outside its statutory authority, or if it has complied with provincial legislation. Consumer protection should also apply to municipalities who do not adhere to matters of administrative fairness. We all pay in some way or another for the negligence of others in authority. Especially when the authority goes unchecked and unchallenged. It's been five years preparing the site, jumping through hoops and we anticipate that it will probably take a few more years before this matter is resolved and we are able to finally end up in our home. What I do know is, that if the City had not changed sewer location on the approved subdivision, we would be in our home by now, we would be hooked up to the proper sewer line and would not be dealing with a sewer that could pose a health risk and risk of backing up and flooding adjacent property owners. There is a reason why municipalities are not allowed to put sewers in places that are subject to annual flooding. When it comes to citizen's environmental health and correcting mistakes by City Staff, Greenwood unfortunately, receives a failing grade.