Booked via apple website for a battery replacement...

Booked via apple website for a battery replacement, on Tuesday, and I drove 2 hours to wellington on Saturday and was told ... "oh you booked from the apple site? look we don't have one in stock, if you want i can order one for you and it could take a few weeks" .......you gota be kidding me ? i thought i have booked and as per the email "You re all set. Your Apple Authorized Service Provider is expecting you." DO NOT GO TO THIS PLACE, THEY WILL WASTE YOUR TIME