Data overages and no accountability from Comcast

From what I have read in your forums, you have removed the graphs that provided information on which device in my household was using the most data.  Now I just have to trust you, when you tell me I am over my data without any proof.  This month of December I doubled my usage, according to you, but no reports have been made available to me to show where the overage is happening.  For all I know it can be someone outside my household using my wifi, but Comcast/Xfinity is unable to assist me.

This is shady, to say the least.  Other wifi providers can give you this information, I do not understand why Comcast is unable to do so.  I have spoken with 5 different customer service representatives in the span of 4 days for about 1 hour each.  Not one was able to assist me.  So please do not refer me to your 1-800 customer service number, because it is not useful or helpful.

I am very dissatisfied with your Customer Service and the inability to provide me with what I have requested.  Please post a solution to this problem, as it seems all your customers are requesting the same.

Thank you.