Poor customer service from Singtel Shop ComCentre....

Poor customer service from Singtel Shop ComCentre. One of the staff was impatient to attend to my phone's screen insensitivity issue which I collected the phone with the screen protector from Singtel Online Store a few days ago. Insisted me to refer to the Mobile Phone Service Centre because they could not make a one to one exchange for my screen protector. I felt it was not right,so I seek help from another Singtel Shop in Tampines branch. The staff did a check and offered an exchange for the flawed screen protector to another item with the same amount. All I can say is that both Singtel branches are busy with customers, but they handled customers differently.