I've been dealing with this for years so don't really know why I'm posting now (maybe because I'm Kondoing old photos...)
My mum and I have been LC and occasionally NC for years. It got particularly bad after I got married and then she and my dad divorced.
When I had my baby she came to visit once - even though I desperately didn't want to see her (and she acted pretty much as expected the entire time) I felt I couldn't deny her the chance to meet her first grandchild.
However not one person on her side of the family - not one - texted, called, sent a card or even a Facebook message to congratulate me. It's been a few years now but I just can't get over the hurt. Also one of her siblings died very recently and I sent my cousins condolence texts (she wouldn't give me their addresses to send a card, only their mobile numbers) which has brought it up again.
Has anyone else experienced anything like this? Googling didn't really bring up a lot of results about being cut off by extended family.