Seeking advice for City owned land to fix failing retaining wall

I could use advice on a 60 foot long retaining wall issue in the city of Atlanta where I am the homeowner of most of the wall (having purchased the house believing I owned all of it). The wall is starting to fail, as rail ties are visibly jutting out by about two inches in some spots. The big-name builder completed the house in 2002 with original rail ties, the height at the tallest at 8 feet and right next to the foundation of my house (not part of my foundation or on it). The City of Atlanta is saying that the builder was supposed to buy the land and right of way but never did, so now they want to offer the property of about 8 feet of the 60 foot wall to five nearby home owners. I've called a couple times and gotten no response from the City engineer who talked with my contractor (who now can do no labor because the City refuses to allow him access, claiming my sidewalk leading to the front of my house should have never been built--also, we did a survey and had an engineer develop plans).

I'm trying to determine best next steps. What does the community recommend? I've emailed and asked for the City's offering price and why they won't assume liability for this since they own the land. Still waiting on a response. Also reached out to my city council person. I suspect this is a ht potato no one wants to deal with.

Thanks in advance for your suggestions.