Lack of communication

My sister-in-law passed away 7 months ago and we have been struggling since then to get answers about the assisted living flat that has to be sold. After numerous emails we were told the flat is being rented out and we received rent on the 1st of April. We have received no rent for May and after numerous requests to get a copy of the contract and the rental payment we are being ignored. Their lack of honest communication is shocking and not acceptable.