This is CSOM, Your ear-drum is having perforation,, it must be repaired, then only hearing will improve and discharge will stop permanently.
Delaying can lead to severe complications.
Next Steps
Get perforation repaired, the procedure is called TYMPANOPLASTY.
Latest TRANSCANAL technique is best, in which there is NO-PAIN, NO-CUT, NO-STICH, outside ear.
Health Tips
Avoid water entry in ear.