Online shopping done wrong

I recently tried Woolworths online shopping. I searched for a product and found it. Trying to add it to my cart, the site asked me for the area I live in. Once I filled in my area, the product was no longer available. If I clear my cache and search again, the product is in fact available. I'm not sure you guys understand how online shopping works. The reason I am buying online is because I don't want to go to my local branch or because my local branch doesn't have what I am looking for, So I place an order online, and I don't care which region / branch you get it from. You charge a delivery fee and send it to my address. But... it gets worse... Not being able to order the item I wanted, I ordered some other items anyway. When I received the delivery, none of the items I really wanted was available / delivered. Only 1 item was delivered and it happens to be the 1 item I cared the least about. Do you not check stock levels before you take people's money? And let me guess... It will probably take 6 months before you refund me for the items not delivered. In 2021, with all of the technology we have available, you guys need to do better.