GRR... Cymbidium on the floor! AGAIN!

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I've been having a bit of trouble with my new Cymbidium that I got from South Africa. It doesn't have almost any roots and it's refusing to stay in its pot and keeps on falling out. In just 2 months I think I've had to repot it maybe 4 or 5 times.. I tried tying it with my knitting kit! LOL! hopefully this will do the trick.
Also I think it might have some tiny tiny white worms..? Is there something you could recommend for that?
But on the other hand it is doing quite well. A lot of new roots are pushing out and I think there is a new growth on its way. (?)