It is not cler if you are having allergis rhinitis which may be a cause of chronic sinusitis
.Or it may be fungal sinusitis
that may be your problem.You actually need to see a different ENT surgeon,take a repeat CTSCAN TO DECIDE WHAT YOUR PROBLEM IS.fUNGAL SINUSITIS IS VERY RESISTANT TO TREEAT.pROBABLY YOU HAVE SUPERADDED BACTERIAL INFECTION TOO.You may try a course of this which I have found very effective for most of my chronic sinusitis patients..Twice daily dose of Ofloxacin
for 2-3 weeks,the trade names of these drugs may be different in your country..so I shall give molecular names.Also 5 days of Piroxicam
20mg twice daily,a Levocetrizine tab.nightly for 2 weeks,and twice daily nasal drops with head well-tilted back followed 5mins later with steam inhalation.This is likely to give you relief.you may continue the levocetrizine for 2 weeks more.