Advice on waiting time

Hi everyone, my husband and I are in a real predicament. Nearly 9 months sale agreed, but sellers can’t find a place to buy. They initially were sale agreed on a property when we viewed this one, but it was pulled off the market. This then voided our contracts as this sale was contingent on them buying that other house. Losing my mind and currently sitting waiting and ringing the EA every week for updates and just hearing they’re viewing and bidding. Is there anything we can realistically do? We have no contracts at present, but can I request this realistically as they have no where to move to? Property is fantastic and we locked in a good price, sellers are apologetic but my god it is endless. They need to move as house is way too big for them. Is there anything we could do that we are not thinking about?