welcome in H.C.M.
I have gone through your query regarding ear pain
and whitish debris coming out along with wax.
Considering all aspects of your history of illness, I am suspecting that you are having wax with otomycosis
in ear. Though you have taken treatment in the form of ear drops and antibiotics but you have pain after ear douching with water.
You have asked about white debris stick on the walls of ear canal
is really fungus and dead skin.
Regarding treatment you should take antibiotic, anti fungal drops and anti inflammatory. Still you need good ear cleaning preferably by ENT specialist