Online orders customer service is bad

Poor customer service for online orders.

My order was delivered without a printed invoice, I contacted customer service requesting the invoice to be sent to me through email as I do not have an option to save the receipt on my Mr Price mobile application. The lady told me to download the receipt under order history, I told her I do not have that option, the lady literally went quiet on me.

I had to figure it out, I logged onto the Mr price website, saved the receipt more than once as I could not open any of the receipts. The files are *******ed, even with the use of a different device to save the receipt, the files are *******ed.

I called again and I was informed it will be escalated with the manager and I will receive my receipt through email. I still don't have my receipt.

Is it my fault the order was delivered without a receipt and how do you expect me to exchange my items?

I am very disappointed with the service, I don't mind paying off this account today and closing it.