URGENT: VPN not working

VPN was working until a few days ago when I restarted my comcast box. I need VPN to connect to my computer at work however ever since the restart, VPN fails to connect. I can connect to my work VPN from home just fine using mobile hotspot from my TMobile phone however I would like to use my WiFi for this. Following is some more information:

Network infrastructure: Arris TG1682G

What I have tried:

1. Called Comcast customer service: the recording never lets me speak to tech. support since it keeps triggering a modem reset promising me it'll let me talk to a real person after the reset. I have lost count of the number of reset loops I have been put through.

2. I am using Windows 10 and have switched off all firewalls. It is not an issue on my end since everything works fine with my phone's hotspot as I mentioned earlier.

3. Disabled xFi Advanced Security.

And yes, I have read https://www.xfinity.com/support/articles/using-a-vpn-connection.