Sibling enstrangement

Hello community members,

I am unsure how to deal with a situation and looking for some friendly helpful advice.

My brother has fallen out with the family because we were unable to help them financially with a situation (amongst other things). We did all we could but it was not enough. There was already difficulties because their partner does not like us (no idea why, when asked the reply is "they just don't"). My brother is quite a bully and blames me and the parents for what feels like everything that goes wrong for them. They have a child which we are not allowed to see and my brother was in hospital very ill recently (4+ wks) and we were not told by the partner. I found out bumping into one of their friends in the shops. We were blocked on everything which made reaching out difficult. So I sent an email and that got returned with abuse. I / we have tried to move past the issue into a healthy space but they want us to accept the blame for something we had no part in. So I said something along the lines of "we will own and apolgise for what we have done if you can do the same and we can move forward".....they hung up and its been 5 months. I am at a loss. They are alienating us from the childs life for what I and the extended family feel is very immature behaviour, and that child is losing half a family because of it. It has been very hurtful.

Any ideas??