Renewal offer not honoured, online offer

Hi,

My contract was due to expire next month; 350mb Volt broadband, Talk Weekends, Talk Extra 100 for £27.

An offer on my account had the 'keep your existing package' for £39, then clicked a few links to decline it and got it down to £33.  I queried over chat if this includes the Talk Extra 100 and they said it did (I have the transcript).

Strangely they could only offer me the same deal for £39, then £35 then £34 no lower.  They wondered why I didn't want to take up the offer.

I accepted the online offer of £33, now I've had the contract documents through and the Talk Extra 100 has been removed.

Has anyone had a similar experience and how do I proceed to either get Talk Extra 100 added back, or price re-negotiated. I don't mind dropping down a speed to keep weekend + talk 100, or weekend + evening calls.  Raise a complaint or call 150 ?

Thanks, 

DJ.