Can anyone explain how to remove the rear middle inertia seatbelt from a Punto Evo please?

I am struggling to do this, cannot find anything in searching.

The middle inertia seatbelt needs replacing but I cannot get it out to do so.

I can feel a zip at the bottom of the seat cover but no zippers,
The top exit for the seatbelt has 2 torx screws but after undoing them it will still not allow the plastic to pull off.

I need to get it out this weekend as I have an impending MOT.

Note - I have the rear split seat out.

Help!
Cheers,
ES.

Never mind, I have struggled and figured it out.

For future reference:

1) Slide the front seats forward.

2) Fold forward the rear seats (the bit you sit on) so that you can access the bottom of the backs, clear the boot near the middle.

3) Undo the 4 T50 torx bolts that hold the middle\split to the car body - 2 at the front & 2 in the boot.

4) Lift & pull the seats forward & they will split - the larger one has a spigot that fits into the smaller one - they come apart.

5) Where each seat fits into the slots by the door - the plastic fitting is sprung and must be levered back towards the seat so that you can eventually lift the seat out.

Once you have the larger back out then you need to access the inside.
6) On the side nearest the car middle\seat split there is a zip - find the zipper (missing from all the other zips) and insert a wire so that you can undo this zip.

7) Take a T50 Torx key and undo the bolt that holds the inertia mechanism in.

8) Undo the 2 T20 torks bolts on the plastic\point where the belt comes out of the seat and by sliding towards the headrest this should pop out as there are catches at either side of the bit that inserts into the hole.
This then splits so that you can remove it from the belt.

At this point, a small torch helps you to see inside the seat.

9) From through the side - pull the inertia mechanism out from the front by sticking your hand through the side.

10) When you get to the T shaped belt clip - this is a struggle but with lots of wiggling it will go through even though it feels like a square peg in a round hole.

11) Pull the rest through - no need to remove the bottom fitting bolt as that fits through easily.

12) Refit by reversing the above steps.

Note: Best to not allow the dog to be in the same room as they want to help and like eating the small bits you drop

Now to find a replacement for the 00717547 belt or a good repair service who can re-web it.
Any suggestions?

Pure DIY here haha