So, what does a company do when faced being held hostage by equipment vendors or providers?
End run em...
Unfortunately, many SMB's fall into this trap, of giving a vendor/MSP unrestricted access and control of services and infrastructure, sometimes we have to unravel the Gordian Knot of things, and take control.
Example, a client was locked out of their own firewall and wifi systems, so we had to solve the immediate problem of just getting internet back up and running, and build out a temp wifi network until we could get the kit needed to replace current stuff.
It finally came in, and we set about to building the wifi network out, kinda like making sausage, messy but tasty in the end.
Once this piece is done, then we can tighten up the rack, properly label and document things to aid in future growth or to troubleshoot issues.
Do yourselves a favor, and gather the info needed to take control of your IT resources; domain hosing, email hosting, etc., any/all services should be in your firms name, under your control, allowing your MSP to manage IT needs, NOT own them on your behalf.
Next up, will be cabling and hanging wifi access points...These are TP Link enterprise class devices, easy to configure, and very good devices.
Perfect for business or resi installs when reliable wifi is needed, don't scrimp, use Rukus, Unifi or TP Link...
When its all done, they will have three separate wifi networks, all off the same kit, each a unique SSID, and passwrd, so the networks are segmented out.