Woolworths ONLINE shopping not reliable.

I did an online order on the 6th. Woolworths said delivery date 9th-13th. Fine. Then I received a notice to say the 13th. Yesterday received an SMS to say delivery would be 'by the 9th'. What does that mean -the 8th?? I waited and kept checking the site which said repeatedly NO INFORMATION AVAILABLE ON TRACKING. How and why do they not have information on their tracking?