Paid for Higher Tier Subscription No Change in Upload Speed

I upgraded my plan from 40Mbps upload speed to 300Mbps, but no change has occurred. I have been trying to reach XFINITY over the phone but the troubleshooting process from the XFINITY customer support line makes you do the same steps over and over again and restarting your router. It keeps saying my internet is fine but it doesn't even understand what the problem is (upload speed) and won't even test it. I tried asking the chat bot to connect me to a live agent but it would not do it no matter what I said. I am so close to cancelling my experience, all I want to do is talk to a human being because the AI is too incompetent to be giving answers to customers.