network={…}
I’m no expert in this whatsoever, but as far as I can tell this looks good. Is there any way you can find out if the Pi managed to connect to the specified access point? You might be able to find this out if you import this package (click the Run on info-beamer button), create a setup and assign that to the device while it’s connected via your hotspot. If you then switch over to the enterprise network, you should hopefully see an ip address in the network section:
If that’s the case, at least the WiFi configuration works correctly.
So there is a proxy as well? What kind of proxy is that? Does it need authentication? NTLM? If the proxy is without authentication, you can create a new configuration file /config/proxy and enter the IP/port like this:
proxy.company.com:3128