Charges against an ex-Gold Coast bikie accused of the violent bashing of his former partner will be upgraded to murder, after the young woman died in hospital overnight.

The alleged savage bashing of Tara Brown, 24, by her estranged partner Lionel Patea, also 24, came less than a week after she sought police help to protect her from him, it was revealed on Wednesday.

The Queensland Police Service has admitted an internal investigation is underway into the "appropriateness" of the response she received at Southport police station, amid allegations officers turned the mother-of-one away to seek help elsewhere.