I was told that I have severe open bite and cross bite, how do I fix this? (photos)

I would suggest starting with a DNA Appliance to grow your mouth wider and seeing an oral Myofunctional Therapist to retrain how you use your tongue.  This may allow you to correct the problem but it is possible you could need surgery to close the open bite completely.  The DNA Appliance gradually and comfortably grow your Maxilla larger which will correct the crossbite and reduce the open bite.An alternative is to do a SARPE procedure to enable rapid expansion.  SARPE is a surgically assisted rapid palatal expansion.Ira L Shapira DDS, D,AAPM, D,ABDSM, FICCMOChair, Alliance of TMD Organizations

By reviewing your photos, I/an orthodontist would need much more informtion prior to rendering an opinion. First of all, what is your age (age is very important when dealing with anterior open bites and possible posterior cross bites due to growth issues). A comprehensive orthodontic evaluation is most important to determine: 1. What is causing this anterior open bite (tongue thrust, airway obstruction, habit, etc...). 2. What is the extent of the posterior crossbit. 3. What age are you and what growth do you have left.Upon getting all that information plus comprehensive orthodontifc records (X-rays, photos, models, etc...) an orthodontic specialist can begin to formulate a proper diagnosis and treatment plan for you in addition to a full patient information/health history review. Only then, can an orthodontic specialist begin to address your issues. Finally, your cursorary question of whether this can be fixed?  The answer is that your situation can definitely be improved.