Connectivity issues

[ML22]

I live in a 55+ community in Fredericksburg VA.  When we first moved in (2021), we had Ruckus connectivity issues and a technician (at that time) replaced on of the two units we have.  A year later, I'm still having connectivity issues, where the signal strength will "disappear" and then come back.  I bought a range extender in hopes of helping the signal to limited success.  I called customer service recently and was told I could no longer speak to a live person for assistance if I owned a Lennar home and to come to this forum for assistance, so here I am.  How can I rectify this issue and is there a live person available to speak to or even come out to my home to troubleshoot the issue(s)?

Sidenote:  When I was last able to speak to someone, I was told that a switch would most likely needed to be changed in the future.  The tech referenced switch, ICX 7150-C12