Comcast will come out to fix it, but you can do it yourself in a few minutes. Use a flat shovel -- just lift the sod, put the cable under it and replace the sod.
Hi Tkccac -- I can help with having the cable properly buried if you're not comfortable performing this work yourself. Please send me a PM with your name, full service address, and either phone number or account number for authentication. I'll get a job built to come bury this cable.
Click my name (ComcastZach) and click Private Message Me.