Poor Online Ordering IT Service

Used online ordering multiple times. With no changes being made on my side the checkout services cannot be concluded as it says there is no billing address -4 days running now. I checked and addresses recorded with nothing having changed. Customer service said it is an IT problem -no message on home page, no resolution. Woolworth customer services complaints allows you to fill in details but wont submit in spite of nothing omitted or incorrect. Called Customer Services and held on for 10 minutes but no one returned. Perennially poor website functionality