Audible charge

[Gib1987]

Hello.

ive just received a bill from o2 with 2 different charges for my audible add on

im just coming the the end of a 3 months free offer and it should go to £7.99 a month.

but on my bill it's changed me first for 3.22 saying offer ends 26th April. But then it's changed me 6.66 saying offer ends 26th may. So that's a £9.88 total not £7.99.

anyone know why this might be. Is it possible because if the time of the offer ending it spreads it over a couple of months before reverting to £7.99? 

[gmarkj]

It sounds as though both are correct.
£6.66 would be before VAT is added (about £1.33) and the £3.22 would be for a part month if I had to guess.