Managing Company Removing Access Pathway

I live in an apartment complex in Location: Pennsylvania. My apartment is a patio apartment, but the building main entrance is lower in the front (Front/main door access from apartment front door would require going down 2 flights of stairs - but patio access goes right level to the ground). The patio leads to an egress pathway that is access to the main sidewalk. The egress pathway was put here when the apartment complex was built 40+ years ago. It has 3 concrete, garden slabs.

When we were shown this apartment 14 years ago, we were told this would be the best apartment for us because I have a disability and my mother is elderly and cannot take steps, so the patio access would make it easier to access the apartment.

For as long as we have lived here, the egress has always been maintained by maintenance during the winter by shoveling and/or salting.

Last week, the egress was not salted and it resulted in ice forming and my elderly mother falling and breaking her wrist along with wrenching her back and hip. When the manager of the property was notified via email, I received a response from his direct boss stating

"Thank you for pointing out this unapproved walkway that appears not to have been salted. This would not be something my team would be responsible to maintain. Seeing that this is an unapproved walkway ,we will be removing these pavers, and we ask that you and all other residents use the approved walkways that are maintained by the site team for your egress."

This walkway is used by at least 4 other disabled tenants who have patio apartments to access the main sidewalk to get the parking lot, office building, maintenance room, and laundry room to fill laundry cards.

I feel like this is retaliation for emailing about my mother needing treatment at the ER for falling on the ice.

If they close this pathway, we will have no other choice but to use the stairs, which impedes our health in other ways. (The yard to the left of the pathway has a steep hill and to the right it is rutty, has holes, and gets very muddy with moisture.)

Do we have any legal recourse?

Here is a photo of said egress

About the photo: My apartment is behind me. The apartment seen in the photo is across the way.