Symptoms: nasal congestion and very bad smell from nose, no sinusitis but enlarged turbinates. could surgery help eliminate the smell?

Not sure: Turbinate surgery is performed by a variety of techniques to improve breathing and I am not sure the odor would disappear. You need a nasal endoscopy to rule out an infection in the nose. If you already have had such a procedure and everything was normal and sinus disease has been ruled out, think of high reflux of gastric acid, so called LPR (laryngo-pharyngeal reflux).