To state the obvious without offence, check that all doors and rear hatch are closed -- AHC system is interlocked with door switches and does not work with doors open.
Then suggest use Techstream if possible to see whether any Diagnostic Trouble Codes (DTC’s) are showing at the ECU – this may provide a lead on the current problem.
Given the state of the fluid, it does seem that bleeding a few more times might be a good place to start – best done after raising and lowering the vehicle – but your vehicle is refusing to raise/lower!!
Suggest attempt the “Height Control Operation Test” (also called the “Active Test”) per Page 6 of the attachment and see whether that allows some raise/lower movement. [Where this test calls for Special Service Tool (SST) 09843-18020, just use an unbent paper clip or similar bridging connector between terminals Ts and E1 at DLC1. The voltages here are low, around 4.5 volts, but do not mix up the terminals). DLC1 is the socket with a black cover showing the word DIAGNOSTIC in the engine bay above RH Front wheel arch – may be different location in LHD vehicles. Note: This test bypasses the ECU and will result in multiple flashing lights in the instrument cluster -- these will revert to normal when the bridge at DLC1 is removed].
There are other possible problems – but best first to be confident that system is purged of air.
If this does not work, please advise – then the next likely issue can be considered. Hopefully, there is nothing complicated like a system blockage caused by ancient fluid and detritus impeding pressure and flow in the system -- but start with easy stuff first.