Yeh might have another go with Blueberries in raised bed and make soil more acidic.
Looks like Sunshine variety tolerates higher PH soils so will give it a whirl.
Blueberry Sunshine Blue (Vaccinium corymbosum x ashei x darrowi) is a dwarf semi evergreen bush producing masses of large sweet sweet berries in late spring and summer. Self fertile, frost tolerant and will reliably produce fruit without a cold winter, this variety is well suited to all parts of Australia. This compact variety is also more tolerant of a higher soil pH than other varieties so it is far less tricky to grow than other varieties.
