Indigo Airlines — hygiene is awful.

Hello. My name is yashodhara gogoi lahon. On 24th october 2017 i took the flight 6e-3645 from guwahati to new delhi.
The entire flight smelled of poop/cow dung, the whole time. It was disgusting. What has triggered me more to write this complaint is, my suitcase also caught the smell. This is really unacceptable from an airline like this. How unprofessional can you all be? Last year also a similar incident had happened. Please invest more on the hygiene department. It is totally awful. Just hate the entire experience.