На супервизу же нужна страховка на год и медкомиссию нужно проходить, поэтому и не дали... In addition to being found admissible to Canada, the parent or grandparent must also:•provide a written commitment of financial support from their child or grandchild in Canada who meets a minimum income threshold; •prove that they have bought Canadian medical insurance coverage for at least one year; and •complete an Immigration Medical ExaminationОтсюда:http://www.cic.gc.ca/english/visit/supervisa-who.asp