Payment Arrangements Having a problem paying your gas bill? Contact Alagasco immediately…you may be eligible for payment arrangements. Alagasco will attempt to establish a payment arrangement that is satisfactory to both you and the company. When making payment arrangements, it is important to make your payment in full and on time in order to qualify for future payment arrangements and to avoid disconnection. Alagasco considers Average Monthly Billing a payment arrangement. Accounts currently enrolled in Average Monthly Billing are not eligible for additional payment arrangements. Contact Alagasco to find out if your account qualifies for payment arrangements: On the Web: Contact Us to discuss Payment Arrangements. On the phone: Call 1-800-292-4008.