Verizon .002 cents
Here's the problem with the caller's argument: There is a difference between ".002 cents" and ".002 of a cent". The caller assumes that Verizon charged .002 of a cent. Verison actually charges .002 cents. The guy on the phone says "you're being charged 2/10 of a penny".
The base unit of currency in the United States is a dollar. Talking in terms of fractions of cents is somewhat absurd given that cents in-and-of-itself is already a fraction of dollars. ".75" cents does not mean .75 of a cent.
I think there is a wonderful little language theory discussion to be had of this.