Firstly you need to get yourself evaluated properly for ETD.
Secondly, nowadays we used to dilate ET and give relief to your ETD and grommet is not required in such cases.
Even Ayurveda i guess cannot guarantee a 100% success rate.
Next Steps
get yourself evaluated by an ENT.
Health Tips
steam inhalation thrice a day,
valsalva maneouver
chewing gum is helpful