well, as long as you water it sufficiently, it will keep growing;
phals can grow almost bare root if the conditions are right. if it
were mine, i'd take another crack at repotting it.
do any local nurseries in your area hold repotting clinics? you might
be better off taking it there--they have lots of pots and stakes and
media, etc.
that said, some phals just like growing sideways.
i have a couple
that immediately start trying to stand on their heads as soon as i
repot them upright.
--j_a