Leroy Merlin Fourways delivery concern

I have a current online purchase issue that doesnt seem to be going anywhere, despite 3 contact centre investigations, 1 email conversation and futile phone calls trying to contact Fourways directly. This is unusual, as ML has been great with other purchases. I ordered 2 aircons over Black friday( this generally comes as 4 pieces), however 1 unit( 2 pieces ) was delivered only, and everyone now seems lost about where the other unit is. The system must show as 2 delivered, because I get SMS 's saying delivered regularly, so not sure if the investigations are ending thinking all is well, when it isnt actually resolved How can we resolve this as I would like to instal before everyone goes on holiday Vague centralised Contact centre /and unattended email may not be best way to go here, maybe they need a WA number per branch that they use to resolve like Makro/Clicks, etc??