Connectivity drops for 1-4 minutes daily in the last week

I called for support on the phone, and wandered through a voicemail maze that ended up with resetting the modem yesterday at about 3:30p.  However, the trend continues.  I understand that maybe the connection needs to reboot from time to time, but having that happen during the business day is unsettling, and leads to a lot of inbound calls to our internal IT Department.  If we have to undergo daily reboots, can we reschedule them for the evenings when the cost to our business continuitiy is lower?   I hate having to make a public post, but I'm not seeing any way to launch a support ticket online, and am not looking forward to spend another 10 minutes navigating voicemail prompts if I decide to call in again.