Can anyone help with removal of bees that have moved into a house wall cavity? Mackay area.
You could try contacting a local bee club. In a wall cavity, you are likely going to need to pay for removal, and be prepared for some damage repair afterwards. Removal by a beekeeper is best though. If you just poison them, you will have a rotting sticky mess in the wall - not fun! Once they are gone, check all of your walls very carefully for a hole which could let bees inside. Even a 1 cm gap is plenty!
Good luck 