Are the washer and dryer required to be left in this sale?

I have recently sold my townhome. It was agreed upon by both parties that we were keeping the washer and dryer we just bought and would provide the washer and dryer from our new house. All the contracts listed no washer and dryer included. The bill of sale we received shows the washer and dryer ONLY mentioned in the exclusions, however both parties initialed, agreeing that a W/D would be included, just not the existing ones in the unit. Now, the buyer is claiming that if we take them, it would be breach of contract, however nowhere does it explicitly say they are included from the unit.