Poor delivery service, 2 day delay!

Hello, i ordered online groceries from picknpay on Saturday and earliest delivery date available was Wednesday 30th November, I chose that and yesterday received an email stating that they were over subscribed for deliveries and that my order will be delivered today 1st December between 9 am and 1pm. I called the customer care around 2:45pm today as my order had still not been delivered and they promised that it would be delivered today still. I have just arrived home and grocery has still not been delivered. This is unacceptable and very bad service from Picknpay! I will no longer order my monthly online groceries with them, such poor service! I want my order delivered today, my order number is ***5