This is a clunky sentence in English, I believe it would more likely be "I want to help". Not sure if it is also clunky in Indonesian - comments?
It's a literal translation from Indonesian to English.
'Saya mau memberi bantuan' = 'I want to give help'
'Saya mau membantu' = 'I want to help'
The same meaning, but a different sentence structure.