You’d be better off buying predatory mites than lady beetles. Main reason being lady beetles diet consists mainly of aphids than it does spider mites. Other reason being it’s hard to keep them on your plants without spraying them with some sugary water to stick their wings and that only lasts for a day or two before they fly straight into lights and frazzle themselves.
So why are you still having mite problems?? Did u decide to only use the eco neem? I did mention that eco neem will only control their numbers once established but u won’t erradicate them. Hose and a CONTACT KILLER is what u need. But then again what would I know hey