Woolworths online Milk dissapointment

woolworths advertised 1.5L Milk on special, i purchased online and got a order number (O*** and O***) however on the day(Wednesday 3rd Aug 2022) of delivery i get a call saying they don't have stock and i said i will wait. different people that i engaged gave me different reasons of why they won't deliver. the online manager at Sandton dispatch (Mamsy) was rude and unprofessional .she said even if i wait, i will not receive it because it is discontinued ,she made an aaaah sound and hung up on me. the other manager in Cape Town (Monicca) said they had a clearance sale. my question is how does your system allow us to place an order with no count of stock. They said they can't substitute or i'll have to pay full price. Now its me with the back and forth with the bank because i used a virtual card.Woolworths just cancel my order. they are so unprofessional and unreliable and i am so dissapointed and the level of no service they offered. Woolworths ref no ***4