Segi Astana Sdn Bhd (916663-H) is the company responsible for managing parking space at klia2. Here is their contact information:
Address
Level 1, Terminal klia2
KL International Airport
Jalan klia2/1, 64000 KLIA, Sepang,
Selangor Darul Ehsan, Malaysia
Tel No: +60 3 8775 6500
GST Registration No.: 0007 8733 3120