Your dealer is talking b@ll@cks!, all of those problems with the infotainment system etc. are very common across the MEB platform VW, Audi & Skoda EV’s are built on.
Usual fix for the infotainment system crashing is turn it off using the button next to the screen, then turn it on but hold the button down until the logo appears. More drastic fix for the phone not pairing or WiFi is to pull fuse 19 out of the fuse box, wait 10 mins then replace it.
Please excuse spelling/typos. Apart from being a clot it turns out I had one on my cerebellum that's now causing various problems!