Billing
 Accepted Monday-Friday at 8:30 AM - 5:00 PM
 Contact person: Supaporn Nasri (Accounting Division) 
 Tel: 02-6682436-9 ext.103
 E-mail: supaporn@coax.co.th
 
Checks receiving 
 Checks payable every Friday at 1:00 PM - 5:00 PM
 Contact person: Puttithada Aeanghlong (Accounting Division) 
 Tel: 02-6682436-9 ext.104
 E-mail: puttithada@coax.co.th