Inconvenient Online Shopping

So today 12.11.2020, I purchased an item online at BWH. The payment went through and a pop up message came up on the webpage to say the transaction was successful and I’d be redirected back to Builders home page. Instead of that, another message came up saying “Oops, something went wrong bla bla bla” My Account was debited though. I waited a couple of minutes to see if I would eventually receive an order number but I didn’t. I called their customer service and the lady who assisted me told me that on my profile she can see that I attempted to purchase. I told her it wasn’t an attempt on my side cause it the payment went through. She said then they’ll require a proof of payment, which I don’t have because I paid with a card, I cannot even retrieve it from my banking app, all I have is a notification from my bank. I then told her that I want to cancel this cause it’s such an inconvenience and she told me that I’d still need a POP or a statement. Mind you, I will not get a November statement from my app, I’ll only get it end of them month. This was my first time purchasing at Builders via online and I wouldn’t recommend it to anyone. Biggest inconvenience, slow response time. I sent the lady who was assisting me some screen shots showing that the payment was successful and screenshots of notification from my bank and I have not heard from her. Mind you, you can only send an email to a generic email which is said to be a “big folder”. I called to follow up if she’s received my email and I was told that she’s maybe on a break cause she’s not on her desk. Online shopping is supposed to be convenient but that wasn’t my experience at Builders Warehouse.