Getting in touch with the modelling agencies is the most difficult task you have to undertake as an aspiring model. It requires lots of self confidence, a non aggressive behavior, non quitting lifestyle and of course lots of patience. You can do a little research and pen down the certain best agencies you wish to submit your portfolio to that can help you get higher on the success ladder.
Join the casting calls organised by various agencies and do not lose hope even if you are failing to get appointed. Look out for the ways to impress the agencies, what actually they require and prepare yourself accordingly.