Repotting a phal

[jackpot]

Hello!

As I am new to caring for orchids, when I bought my phals I just thought I'd enjoy the blooms first, and then repot when the spikes would die off.

But because I learned some thing in the meantime, the flowers stayed for months. Which was awesome, but some flower spikes never did die, and now the orchids are starting to throw out new spikes as well.

Now, I still thought that it might need a repot because there were pieces of spunge mixed in the media. They get stuck to the roots and discolor them as well, so I figured this might not work until I would get new blooms I could be rotting off the roots at the same time, especially since one seems to be doing well, but it's staying quite wet forever. (I use the bamboo skewers)

One problem is though, the roots were growing a lot in the bottom of the pot, and they are now stuck together in the shape of the bottom of the pot. I tried to kind of squeeze them loose gently but they have grown together. I tried to pry one off but it's clearly damaging the roots if I do that. I don't think I should be fitting that chunk of roots back into the pot, because it doesn't really fit so well anymore, and I don't want to apply that much pressure to get them back in. I could fit the whole plant into the same size pot if I could get the roots to untangle a little.
The one size bigger pot seems a little big to me for it.

Any suggestions?