BT vision unclear pricing

jackthecube

I signed up for BT internet and thought i'd get BT vision because, at the time, it seemed quite cheap.

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Order summary One-off Monthly
BT Total Broadband

BT Total Broadband Options
BT Total Broadband Option 1
BT Total Broadband Option 1 gives you up to 20Mb download speeds, email, basic security with 10GB monthly usage and a BT Home Hub included.
£15.65
Contract term
18 months
£7.78 a month for the first 3 months and £15.65 a month thereafter
£-7.87
Equipment
BT Home Hub 2.0
The BT Home Hub 2.0 gives you a better wireless connection through 'N' standard wireless technology. It connects your computer(s) and laptop(s) to your BT phone line giving you wired and wireless broadband all over your house.
Free
Free calls
Broadband Talk Evening & Weekend calls
For no additional charge, BT Broadband Talk gives you low cost phone calls over your BT Total broadband connection. With the Evening & Weekend Plan, you get unlimited calls to UK* landlines and Broadband Talk numbers between 6pm and 6am weekdays and all day at the weekends. Plus calls to UK mobiles from only 7.34p a minute† and great rates for international calls.
Free
BT Vision value pack £10.27
Kids
Keep the kids entertained for hours with all their favourite shows ? with no adverts, for extra peace and quiet for you!

Music
All your favourite music videos and live concerts ? plus great documentaries and even karaoke too!

PictureBox Film
Ideal for film buffs, with everything from cinema classics to family popcorn favourites.

Already included in your value pack
TV
All your favourite TV - with great drama, comedy, documentaries and much more.

Replay
The only way to catch up on the best of last week's programmes from BBC, ITV, Channel 4 and Five.

Total one-off charges (including free delivery) £0.00
Total monthly charges £18.05

Now 3 months down the line and the Vision price has jumped up to £17.61 a month! After ringing bt to complain i was told that the Vision was half price for the first 3 months. There was no mention of this on the website when i signed up or on the email. Its quite clear that the internet is half price for the first 3 months but not the TV. I feel like ive been conned into paying double what i signed up for. Any ideas?