Hi @LNL02360 welcome to Meraki Go! I am sorry to hear that your presale experience wasn't good. If you have more feedback on that, I'd be happy to pass it along to the team for you! I'm sure they'd welcome the feedback to improve our processes.
Hm, I'm having some trouble locating your support case to check on it. Could you please private message me your case number, so we can assist? For anyone else reading, there is a guide here on how to create a Meraki Go support case.
In the meantime, you can find our Documentation for Configuring VLANs in Meraki Go for GX Wired Networks. You mentioned the installation guide, so chances are you already saw this and it's not what you're looking for (I'm revealing a bit of my IT ignorance here 😅) but in the GX Installation Guide underneath Additional Settings there is info on Setting VLANs. I also found this unofficial YouTube tutorial of walkthrough unboxing and setup of the GX50 which may be useful to you.
I hope that helps!
... View more