Our buyer has been pushing us to exchange for weeks saying everything is good to go at her end and how long will we be (delays because of surveyor report). We've since signed everything and have been waiting for exchange since Monday but the buyer's solicitors are now refusing to take our solicitor's calls or return emails. When the EA got hold of them yesterday, they told her the file wasn't complete and needed checking to be countersigned. Our vendor has now threatened to withdraw if we don't exchange today. I've chased everyone I can think of and sent as many emails as I could. Am I in a position to put a complaint in against her solicitors? Their incompetence is threatening our purchase and I'm so, so worried and upset.