Ameren Illinois said Wednesday it's had reports from more than 50 customers this week who received calls from someone claiming to be from utility and threatening to cut off service if a payment isn't made within the hour. COLLINSVILLE — If you get a call from someone claiming to be from Ameren Illinois and threatening to cut off your service if you don't make a payment within an hour, this is a scam attempt, the utility has warned. Ameren Illinois said Wednesday it's had reports from more than 50 customers this week who received these calls. read more