Shocking online shopping experience.

Tried purchasing 2 large items online. Every secure recommended payment channel failed. Cart updated incorrectly, removed items, adds items, doubles items, items then vanish from my cart. Randomly get logged out, then wont let me log back in.

I get emails prompting me to complete me order then I am not given the complete payments option. I get some vague error message telling me "technical difficulties".

Now it says all the items I want to order are out of stock, even though I cancelled my orders. So clearly its not even updating their database correctly.

How is live platform acceptable? and can I please just order my items. Why do I have to beg to spend my money?