You fractured your fibula not the tibia, and this typically would be fixed with a plate and screws. It also looks like your ankle mortise is widened on the medial side (inside). (the space between your tibia and the talus)
You very well may have flipped a piece of your deltoid ligament into the joint. This would require two incisions, one for the plate and screws, and another on the inside of your ankle. You did not include the important lateral x-ray- I hope they got one as well.
As I said in the earlier post, it is pretty rare to dislocate an ankle and not get an associated fracture. Your x-rays confirm this.
Your fracture is very obvious- the ER doc you saw was a moron if he or she missed this- really, really weak. What would they be doing if you had a serious life threatening event? I wouldn't be going back there anytime soon.
Personally, I would get a copy of the note from the ED doc where it says he/she did not see a fracture, then get copies of the notes and x-ray reports which clearly do show an obvious fracture, and send it all to the risk management people at the hospital where you were initially seen.
This serves the purpose of hopefully having the hospital educate the ER doc that missed your fracture, and perhaps will help someone else in the future with a similar injury. No one knows everything, but missing this fracture, if it's as you reported, is egregiously bad.
You're probably looking at the surgery itself (keep it elevated so it doesn't swell too much and your skin is OK with no blisters), perhaps 4 weeks non-weight bearing in a splint/cast, then PT with range of motion, balance, strengthening, etc in a boot for a while. This is all somewhat surgeon dependent.
How do I know this? It's the internet, and I'm a full time academic orthopaedic orthopaedic surgeon. Good luck.