I called again today to follow up on the interleaving. The guy said "It was switched off as on the 3rd of March."
Err. The guy last night told me it was still on. I have not noticed any kind of decrease in ping to anything at all. I was told that the order put through on my line was honored on the thrid of March. Even though I gave him a case number from the 10th. Reset the router just to make sure. No dice.
I think Telecom have their lines crossed...
Joy all around.