Yes. But it's difficult enough to get human beings to understand in live conversation let alone go down that route. Honestly, they are a nightmare to deal with.
The tip of the iceberg of my dealings with them was when they denied me nearly £1000 that I was legally entitled to on the basis that...
Most of the dailys make reference to it being the most that could be charged in their articles.
Anyway at 15p a minute, for the time I used to spend speaking to a number of poorly trained operatives as a result of UC's own errors, a normal call would often cost a fiver regardless.