We purchased a property in division with my brother in 2007.

We purchased a property in division with my brother in 2007. There was a falling out and we left the property as they changed the locks and it became intolerable. We requested it be sold and they put barriers in the way and continued to live there. We went to court and in 2013 won the case to have it sold and be compensated. They appealed and in 2017 it was upheld to be sold but the compensation was quashed on the grounds that the property was big enough for us to live alongside them. This was obviously a ridiculous suggestion.
JA: Where are you? It matters because laws vary by location.
Customer: They apparently failed to sign paperwork required for the sale to proceed and we then discovered upon visiting the property that they had abandoned it some years(?) before and it was derelict and vandalised. we abandoned the whole thing the stress and costs were too much for us. We remain in France in rented accommodation, I believe they returned to the U.K.
JA: What steps have you taken so far?
Customer: it now turns out they have a court hearing to seek to sell the property but we no longer have any money to appoint an avocat to represent us. What happens if we do nothing?
JA: The Lawyer will be able to walk you through that. Is there anything else the Lawyer should know before I connect you? Rest assured that they'll be able to help you.
Customer: can we write to their avocat to say we agree to the sale and thus prevent the court hearing?