Very unhappy customer

Placed an order 08-May-20... Delivery date : 20 May 20 My order has since then been postponed 5 times...the last 3 times the day before schedule delivery my order gets postponed....Emails do not state a reason as to why. If they do not have stock do not put the items on or be more specific to what stock you have,I have placed a big order and I am very disappointed at the service I am receiving..IF YOU DO NOT HAVE STOCK FINE CANCEL THE ITEMS BUT STOP POSTPONING THE REST OF THE THINGS ESPECIALLY IF IT HAS ESSENTIALS ON IT