20 to 30 hrs of battery (supposedly)

hi everyone, about a month ago i did the battery update 1.2 and then my battery immediately changed its duration from normal to between 20 to 40 hrs and the capacity changed to 64984 mAh at full charge, of course the real life was lower than 2 hrs. Two weeks later, the battery life starts to low down even more, but always shows full charge and between 20 to 40 hrs of duration supposedly. But the battery was able to charge until one day just stop charging for another week. And now it seems that it is charging again, but still shows 20 to 40 hr of duration and 100% of charge. I just really dont know what to do because Ive tried so many things and I went to the only Apple Certified Store around here (in Guadalajara, Mexico) and they just kicked me out and said: "go over internet and contact Apple by yourself, we cant help you"
By the way, i buy the computer in april of last year and my battery was replaced about six months ago.
So please help me!!!!! Im desperate!!
macbook pro 15in   Mac OS X (10.4.10)   1Gb RAM

i know, but at least could somebody tell me what I can do in this situation because the tech support in here *****! they didnt even know about the battery update and they said that I can contact Apple by internet but my guarantee expired in april this year. But Apple said that the battery guarantee is now extended for an extra year, so how can I contact them without an AppleCare and how could I know if they can replace my battery??
well, in resume, the Apple service center (if you can call it that way...) send me here because they couldnt help me because of their incompetence, so please help me I really dont know what to do

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