Undelivered item

I bought groceries online via the app. I then noticed that one item was missing. I called the customer service Saturday morning and they said they will deliver between 2pm and 5pm Saturday as that was the slot I chose for delivery for Friday. I waited and no one came. Monday 4th Oct I called again and they said they will deliver on that day between 2pm and 5pm. I’m still waiting for that deliver and it’s now the 5th. I’m honestly disappointed