The lack of care and information is just awful and I experienced the same, but can I please give another perspective? Because of how dire the support was, I sought out some alternatives.
I discovered I had a prolapse ten days after my lovely 10 1/2lb son was born.
I'm putting it more down to the previous birth when I had a tear that healed over, combined with being encouraged to be out doing things the very next day- and probably set me up for a weakened pelvic floor for that subsequent pregnancy. For that first baby, he was back to back and I was made to birth on my back, for the second I stayed upright and the rested after his birth.
11 months on I'd seen lots of improvement just from normal post birth recovery and everything gradually starting to lose laxity - the Chinese consider the postpartum period two be 2 years. I discovered plenty of walking is a really good this thing. The main thing was the everything about to fall out feeling was still painful and scary.
I had seen an obstetric physio who didn't examine me but said she advised a 'little fix' and also a gynaecologost who managed to further damage a small graze from the birth that I hadn't even known I had! - which then took weeks if not months to heal.
I then started to see a Bowen therapist at 11 months postpartum - they work gently on soft tissue. After three sessions I was out of pain for the first time in 11 months.
Within a couple of months I was pregnant with my 3rd child and understandably quite terrified about what this might mean for my pelvic floor. I continued to see the Bowen therapist until 2/3 way through that pregnancy. I sailed through that pregnancy and birth and the prolapse remained in it's improved state throughout pregnancy and after the birth. While I still have mild prolapse(s), I have no symptoms so to me they're as good as not there. - It's now 13 years on.
I'm pleased I avoided surgery - it would have been at the height of the mesh scandal. Good luck with the birth. If you decide not to go for a c section (look up and read about fascia - it's fascinating) then try to read about the positions to give birth that are gentlest on womens' bodies.