Sorry to hear that your plans are not progressing as you had envisioned. However, it is *not* a good idea to call and essentially beg for reconsideration. It will not work in your favor. In fact, it could do long term harm, esp. if you are contemplating reapplying and/or transferring to one of these institutions in the future.
Rather, wait until you hear from all of the programs to which you applied. Then, if you decide to reapply next year, contact individual professors directly and ask about what they look for in a student? Find out about their research agenda, find out their sabbatical schedule (if the Chinese specialist is going to be on leave 2 years, then that institution will likely not take any applicants in your field, etc..), etc...