Welcome In H.C.M.
I have gone through your query regarding ear discharge
and ringing noise in ear .You have already tube put in your ears but they are helpless.
As per your complaints I think you are having middle ear infection
which has to be managed properly otherwise complications may arise. You should do-
(1) Culture and sensitivity of ear pus.
(2) C.T.scan of ear - HRCT
of Temporal bone
Beside this examination of ear is must to see condition of ear drum, position of gromet and mastoid tenderness. Examination findings are helpful in planing treatment so it is my opinion that you should consult your ent doctor rather than GP for treatment.