Horrible Online Experience

I was so excited when I found out that my favourite store now he an online shopping division but my experience with my very first purchase has been the worst. I placed my order on the 24\07|18 At night and promptly made payment on the 25/07/18 first thing that morning. I even selected the option for immediate payment which charges me extra at my bank. I did not receive a confirmation of my payment so on the 26/07/18 I called the TFG customer centre to follow up on my order and was told that my order was still awaiting payment to which I immediately sent through my proof of payment and received confirmation that my proof was received . This morning 27/07/18 I get an e mail saying that my order was cancelled due to non-payment!!! And it cannot be reinstated and there's is nothing that can be done! I shop online ALL THE TIME on various sites and I have never received such horrible service.