Airport Wings — Staff lacking knowledge of visa

This happen yesterday to my wife who traveled first time to abroad. She was holding valid Entry Visa to Singapore. It was a entry visa to Singapore which was valid till 7th Dec 2022. Unfortunately staff at boarding counter made a unnecessary issue saying your return ticket is on 11 December 2022 and Visa valid is till 7th Dec. Actually it was entry visa with multiple journey.
They hold her from boarding and ask to reschedule the return ticket before 7th Dec. Giving unnecessary panic and trouble.

It was clearly lack of knowledge from staff on visa guidelines. Due to this my wife had to surfer tough time at airport.
Staff clearly lack the understanding of entry visa and stay visa.

Please educate and train them to avoid such misguiding and trouble to other passengers in future. (INDIGO FRONT DESK STAFF).