Connection Dropping

Lately the connection to the Internet has been dropping.  It was fairly regular last night throughout the night.

I have reset my modem several times.  I don't want to call customer support because they will tell me to reset the modem and when it connects they will think everything is ok -- but it isn't because it drops randomly.

I am renting a modem from Xfinity.  Haven't had a problems with this until the last few months.

How do I talk to a PERSON ast Xfinity.