New Phal with unidentified pest problems

[Sparkles2015]

I bought this Phal on impulse at a nursery about two weeks ago. Since then I have noticed a few small problems, including clear neglect by its previous care-taker as many of the roots have constricted sections and the leaves are not flat. However, the most pressing issue is the tiny bugs I have seen crawling in the medium and when disturbed they move to the leaves too. I have attached two pictures of some damage to the leaves I found. I also was able to photo one of the small buggers, it doesn't look like anything I've seen. I took a longer range shot to show relative size, they are really small!
I have sprayed the leaves with an rubbing alcohol mix and wiped them with some diluted dish detergent to no avail. Any suggestions would be appreciated, thanks!!!