Remove the fuel pump on a 1995 VR6

I have already removed the large nut/ring from the top of the pump and
I was even able to remove the upper assembly. This is the assembly
that has the float arm attached to it. When I attempt to remove the
pump from the bottom of the tank it just holds tight. I have the
Bentley manual and I am following those directions. The manual says to
turn the pump to the left on the Bayonet connector and remove. I can
get the pump to turn a little back and forth but it definitely will not
come out!

Can someone please let me know if there is some kind of trick or
expalain how this pump is secured to the tank? Thanks!

Background:

The car is a 1995 Passat GLX VR6 Sedan with 150,000 miles on the
odometer. I was driving down the freeway in about 5F outside temp.
The engine suddenly began to hesitate and within about 10 seconds had
completely stopped. Of course I had the car towed into my garage at
home. I briefly believed that the gas line had frozen until I learned
how rare that it is. Now I have completed the checks in the Bentley
manual and determined that the fuel pump motor has simply died. I have
been able to exclude the fuel pump relay and the fuse as being the
cause.