Iphone and Complete-M in Germany

I have an Iphone with an edge data flat and a 300mb limited HSDPA plan. As a curious guy I want to know how much I have used of those 300mb HSDPA. Calling T-Mobile for 3 times results in three different opinions:

  1. Callcenter person 1: I should wait for the next month, then I will see the usage in my T-Mobile account (One month later I see nothing)
  2. Callcenter person 2: I can't look online but I should call the call center to ask, they will tell me (and the employee told me my usage, 41mb of 300mb back then)
  3. Callcenter person 3: No one knows how much I've used. They can't see it in their computer (I wonder how the second one could know) and it's not possible for me to see my usage

Isn't that funny? I have a limited data plan, but they can't tell me and I can't see my usage? They are able to monitor all my calls and monitor all my usage and tell (on demand 😉 the police, but they can't tell me how much I've used? They can limit my flat rate to EDGE after 300mb, but they can't tell me how much I've used already? And I can't see?

I'll call tomorrow for a fourth opinion 😉