Wifi always disconnects

Can I get a new modem sent to me? This one always loses connection and all my tv's keep losing connection. 

You can try replacing the modem (probably a gateway device actually, if you're renting it from Comcast/Xfinity), but the most common cause of Internet problems is a poor connection between your modem or gateway and Comcast/Xfinity's network, often due to poor coax connections or damaged coax cable, usually in or near your home. Running the cable through a surge protector, a defective splitter, or too many splitters can cause signal problems as well. If there is an amplifier in the line make sure it's getting power. 

If you want to troubleshoot this yourself, please see Internet Troubleshooting Tips. If you can't find the problem or you'd rather have Comcast/Xfinity take care of it and an employee does not respond to your message here, call them at the phone number on your bill or 1-800-Comcast, or use one of the options on https://www.xfinity.com/support/contact-us/. It's not likely they can fix the problem remotely. If not, insist they send a tech out to identify the cause and correct it.

If the tech finds bad coax, splitters, amplifiers, or connections in your home (even if Comcast/Xfinity originally supplied them) you'll probably have to pay for the visit (approx $100) unless you have their Service Protection Plan ( https://www.xfinity.com/support/articles/service-protection-plan, closed to customers that don't already have it). If the trouble is due to a faulty Comcast/Xfinity rental device or anything outside your home you shouldn't be charged.