BMobile not recognise Samsung 3G phone

My friend bought a 3G Samsung mobile phone in Bandar, she try to buy a 3G line at BMobile, the staff try to load the simm card into the phone, testing and said the phone is NOT a 3G phone! Mention to her that she cannot return back the simm card then may be she can sell the simm card to her friend. She spend a 3G phone that cannot be use as a 3G phone, so you can imagine how angry she is, so where we can complain regarding these thing? To Samsung and complain that their 3G phone cannot fix to our 3G line! May be it is a good idea.