EXTREMELY SLOW INTERNET

MY INTERNET IS RUNING EXTREMLY SLOW.  4Mbps.  IS UNACEPTABLE, AND WHEN CALLING OR TRYING TO GET SUPPORT I'M JUST GETTING AN AUTOMATED MESSAGE TO REBOOT MY ROUTER.  I'VE DONE 20 TIMES AND IS STILL NOT WORKING, CAN'T GET ANYONE AT COMAST TO HELP.  WHAT AM I PAYING FOR, ?  COMCAST OR XFINITY, WHATEVER YOU WANT TO CALL YOURSELF,   WAY TO BE THERE FOR YOUR CUSTOMERS WHEN NEEDED!