Langham Place is one of the newest shopping centre in HK. It has a fascinating interior (which can be confusing at times) and the longest escalator I have seen in a shopping mall. It also offers a range of shops from designer stores to little shops full of character. You don't have to worry about food either, the Place has a whole floor containing nothing else but restaurants.
Ladies Street is within 10 minutes walking distance from the Place, a street with thousands of stalls selling souvenir at low prices. Make sure that you bargain with the stall-holders, start at half their asking price. They will probably put the price up because you are a tourist, so just walk away if they don't agree to the price. Then, in most cases, you will be called back and the stall-holder will sell at the price you have asked for. And don't forget, the market doesn't open until the afternoon.
Langham Place: 555 Shanghai Street, Mongkok, Kowloon; nearest MTR: Mongkok
Is this your business?