So the B pillar didn't stay in place then?
There's a little trick I discovered for those types of repairs.
I glue in the part then glue a backing strip of paper with Superglue.
Best to use the tissue paper used for packing.
It's thin and strong.
It works like fibreglass does in real life.
The paper absorbs the glue and becomes as hard as plastic.
I actually make scratch build items that way too.
Much cheaper than plastic card.
More readily available and easier to work with.
You can easily make curves even tubes with paper and Superglue.
You can use Superglue and baking soda as a filler or Superglue and plastic dust from sanding/filing.
That's what I did before I learnt that baking soda and Superglue was a thing.
I discovered the Superglue and plastic dust for fixing my slot cars because they're rarely ever painted and I needed repairs that would have the same colour as the item being repaired.
Best part of using Superglue and baking soda/plastic dust is it doesn't shrink and dries much quicker than putty, it also doesn't melt the plastic
13. July, 20:29