Unable to check for updates: cant connect to Apple Sofware Updated server

I uploaded the system with Ventura 13.2. I never had a problem with Apple before, but now every time I go to Apple Store to get help with the Genius Bar, my computer gets worse. I don’t know what to do. First started with Microsoft Office didn’t run well; I went to the Apple Store, and “they fixed it,” but the next day, I noticed that I didn’t open App Store, and I didn’t look for any updates. , I went again to the Apple Store, and I was told that I needed to reset my computer, but I was “too late” that day. I needed to make another appointment, came for three days in a row, and left my laptop there; they told me, “back in 2 hours” when I came back told me, “here is your computer. You can do the rest in your home”, came to my home and THE SAME problem continue. Now I cannot connect my account anymore with the computer, so: it’s worst. I scheduled a 4th appointment for today. I already change my and password, reset my computer, see if “the hour is ok”: everything!

I don't know what to do, it is the first time that I have a problem with my Mac, this never happened before and I suspect I was because the new updated, some code could be corrupted😕

What should I do now?