Air suspension fitted without checking leafsprings

I asked Conqueror 03/03/2014 if the can repair my TJM leafsprings on a Hilux.Was advised to fit air suspension with the current TJM suspension.Was done on 6/6/14 and they fitted air suspension for a highrise vehicle,without checking condition of the current leafsprings,which has sagged from highrise suspension to normal suspension.They did not supply instruction manual nor fitted the min/max pressure stickers supp****. Since then,in the Richtersveld,the Alu canopy broke loose,the extra fueltanks brackets bend &amp