Our internet connection has been capped

due to our d/load limit being reached. it is at 64k/64k, a big difference from 1500k/256k. It has upset my son the most, he plays world of warcraft and he is not happy. Of course it depends on what we d/load but it makes you think is 50gig a month enough. It is frustrating when it is slow but i remember when it was great when we had the 56k modem.