Crown rot in blooming Phalaenopsis?

[Fenix]

First time to experience what I think might be crown rot?

Received an orchid as a gift with about half the flowers open and over a week a few more buds opened. I noticed today that one of the earlier flowers started wilting and I thought that was strange since the blooms are not done yet.

Upon closer inspection looks like the base of the plant is rotting. Tissue is black and feels soft and mushy. Note since I received it I haven’t watered yet. It’s been with me for just under two weeks now.

What should I do to address the problem?