This does not really concern the issue about money anymore...
This is about the reputation and reliability of the sponsor...
They are not doing the business in the right way if the notice states that the offer/promotion is till 28th den it should be till 28th... If there is a change they should at least take down the notice or alter the date... So that there will not be any mis-understanding like this...
And if the customer sees the notice and would be buying the things, the boss should be selling the customer the items at the promotion price becos it is their negligence...
Think would be good if Jireh would stand out and clarify...
Just my opinion...