Air pump don't work
Breast cream don't work - all drain money only.
Slimfit - dunno, but effective rate not very high and money paid is
not worth the little bit gain.
Massage cannot increase a cup size. Probably tune it to better
position, shape and everything, but it will not increase its mass
by massaging (this includes exercising. Doing chest exercise can
only strengthen chest muscles and give apperance of a bigger
breast, but this cannot increase cup size)
You can try pills - but you are warned about the possible
side-effects. For average woman, breast pill usually have effect
within 6 months of intake.
***
To increase breast size within a short span of time is impossible
without breast augmentation.
A good healthy long term solution would be to increase food
intake to boost and increase weight, then work-out to trim down
areas you don't want fats to appear.
Breast made up of fats.
Only way to increase fats content in breast is to have more fats
content.
Naturally, when you gain weight, you increase your fats ratio in
your body. But fats are deposited different part of your body and
probably only a very small percentage goes to your breast. Worst if
you go on a crash diet - the first area your body will drain is
your breast. Big ladies who enter crash diet to lose weight and
succeed, will find themselves decreasing in probably two cup size
or more and in the new body - they could look really
unproportionate.
***
Psychologically, be satisfied is the best. 
Cheers
