Sorry, correct me if I'm wrong but it sounds like your refering to the call package as being the same as line rental when they are two seperate elements.
You would have to have 3 products to have BT's infinity.
1.Line rental, normal phone line
2.Call package, bogus free evening and weekend calls
3.infinity broadband ( rebranded fttc)
(Bogus = it's not actually free, you pay for calls in advance, but if you dont make anycalls, you still pay in advance for nothing. Check your BT itemised phone bill for mysteries service charges).