oxnsox: The Guy seems to admit the liability, not only by saying he knew it was expensive (because he had done some research and/or read some forums on the issue) but also by saying he wasn't fully aware and familiar with the T&C.
Soo is his issue being unaware of the T&C or the delay in the billing process?
Delays in the billing process didn't stop him using the data.... Or is that his point, that had he seen an accurate ongoing bill then he wouldn't have kept using the services??
If the guy had traveled before he would have known to watch for bill shock, and manage the data roaming. Or would have bought local sims en-route as many travelers do.
But hey if he wants to fight the dragon good on him for giving it a go.
I believe his point is that he saw a bill which he believed to be accurate and was mislead by it. The bill lacked sufficient (or in fact any) detail that would allow him to know it was inaccurate.