Ok, so Vodafone’s promotion was “You only pay 1p per minute after the first hour!” the small-print (which I didn’t read) was “Calls are charged at 1p per minute after the first hour as long as you hang up and redial to activate the promotion (or something”
Naive idiot in a long-distance relationship spies an opportunity to save some cash on long phone calls but gets stung by not reading the small print.