it might have been better to skip the christmas tree thing and trim the stem earlier
might have been able to stop the rot from going into the centre of the plant
its not looking so good
in chasing the rot i cut into something more yellow looking in the centre
i will still try to revive it
before haircut:

it was looking promising at first:

i kept chasing the rot in the centre

water was pooling in the centre so i cut a drainage channel

i may have cut into the flower bud
the very centre looked yellowish
also it was rotten quite far down

i wont give up on it but it certainly does not look good right now