Complex sentence: The brand Omo was used when it was introduced in Australia and New Zealand but in Australia and South Africa, Surf as well as Omo are sold and they are both top-selling laundry detergents in Australia.
Split into simpler sentences: The brand Omo was used when it was introduced in Australia and New Zealand. Currently in Australia and South Africa, Surf as well as Omo are sold and they are both top-selling laundry detergents in Australia.