An employee claimed they had to pack up on the same day they received the news.
Sister brand Daily Grind has reportedly closed all outlets in Singapore as well.
Tangs will double the frequency of pest control and sanitisation efforts.
The funds had been misappropriated, the company said.
The promotion lasts till 20 Dec and is available from 11.30am to 6pm on weekdays only.
Unity previously caused major controversy with pricing fee changes in Sep 2023.
The teenager claimed she had trouble communicating with her grandfather due to language barriers.
He was sentenced to 10 years' jail and nine strokes of the cane.
Working in Singapore and spending the salary in Malaysia was recommended.
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