Unfortunately, due to the volume of users, we can't offer chat support to everybody. You can access support options available to you by clicking Get Help button here. I noticed there was a limitation on your account and have already followed up with the team about it.
Mohsin, as a practical matter, there are so many active participants in the Community Forum and some of them are so talkative, that posting questions and discussing topics here is often better and more helpful than anything you might encounter using Live Chat.
There are few specific operations and buttons that Customer Support agents have direct access to, but that's a rarity. Nearly anything you might want to do on Upwork is something you have user-side controls for, which we could point out to you, and nearly any question you might have is something you can ask here and get great answers for.