I think it's highly unlikely that he did this through chat. The only way i can think of him getting your info through the sony network is if he is sniffing packets with something like wireshark and capturing your internet traffic to get your ip address, then doing some kind of DoS attack. He could have logged into your router and closed all of your ports, which is an easy fix, but that's unlikely.

If he is in fact the culprit, then he is either really bright, or really stupid. If he did this to you on his own account then you can contact sony to report the issue, as they're likely to be held partially accountable in this circumstance given it happened on their network. They should have his billing info and all of that. However, if he is using a VPN proxy, or TOR, encryption, and a hacked sony account, then there isn't much you can do beyond getting your router running again.

Your modem and router should at least be receiving power, and if not, plug em in! He couldn't have affected power sources. If router connection still doesn't work, then try connecting directly to your router with an ethernet cable. If none of that helps then call your provider.

You have a few other options too.

• If you are running windows, go into run, type cmd, when the prompt pops up, type in "ipconfig" without the parenthesis and hit enter. If you're on mac then go into spotlight and type console, hit enter; type "ifconfig" without parenthesis and hit enter. Retrieve your own ip address, type that into the url bar in your browser, enter the admin name and password. Once logged into your router, change the admin name and password to something with at least 12 characters, and do some kind of wireless set up using WPA or WPA2 security. Go ahead and check out your connection status, and see if any ip addresses are blocked. He could have blocked all of your LAN addresses; just open them back up. He could have blocked or closed all ports on your router; open them back up.
• An easy way to test your routers ports: Use domainTools, to test/ping your ports to see which respond. You should at least have ports 80 and 443 open. If you see ports 135-139 open, you might want to look into closing those if you don't share connections with anyone. These are pretty common culprits for the types of attacks this guy could have used, if he did.
• If your router problems continue on and on, then look for the reset button on the back of your router, and hit that to restore factory settings. Then, log into

Disclaimer: be careful about how you use these tools. They're generally used for network engineering, and pentesting - improper use (using some tools on a network you're not authorized to) can get you into some trouble if you're not careful. just stick to your own network.