COFFEE BEAN STAFF REFUSE TO ACCEPT BRUNEI CURRENCY

I went to the Century Square outlet on 17/4/16 at about 1:15-1:20pm.

Tried to pay for my drinks with some brunei dollars and the staff said that ‘we don’t accept Brunei Dollars’

I thought the Monetary Authority of Singapore state that ‘businesses can safely accept Brunei currency for payment’?

Please educate all your staffs who do cashiering about this.