It does say unlimited m2m calls, however if you make them after day hours, you get charged the minutes against your night and weekend minutes, but if you do it during the day they don't charge them against your anytime minutes.
The customer support phone number of Energy Assistance Minnesota is +1 507 328-6508/ 800-889-4970 (Click phone number to call).
Xcel Energy Corporate Office Headquarters. Xcel Energy Inc. 414 Nicollet Mall. Minneapolis, Minnesota 55401 USA. Corporate Phone Number: 1-612-330-5500. Fax Number: 1-612-330-5878. Customer Service Number: 1-800-895-4999.