1. Do they have grain? If so, get yourself a grain or hop bag and get some steeping grains.
2. Making your beer more hoppy? Aside from the obvious answer which is to buy more hops, the easiest ways to get hoppier beer are as follows:
A. Don't add your extract until later in the boil. Start hopping the water right away, though.
B. Dry hop, i.e. add some hops the beer in the carboy about 10 days before you are ready to bottle or keg your beer.