Not sure what the solution to JohnK's is, if he calls them up and explain, they might try something on him.
If he leaves it alone, they will keep pestering the number.
Not sure if he writes to them, would they listen or reply to his letter.
Worst is if they start asking him for id to "prove/provide proof he has taken on the service "newly".
Its hard.
Its like being between a rock and a hard place, so to speak.
Or you just can't win.