Mr Price takes my money then cancels my order

I ordered clothes inline on the 27th of October and decided to call on the 5th of Nov when my order had not come. Please remember that we pay a delivery free which stated that my order would arrive on or before the 31st of Oct. when i called, i was told the order was not reflecting and they would call me back.

I did not receive a call so i decided to call again today. I was told that my order was cancelled due to lack of payment, which is a shock because the payment went through. I was then asked for proof of payment and that the statement which is what my bank can only provide, is not sufficient. I emailed MRP help with a screenshot of my statement which shows their name, the transaction date and the amount.

Mr price- this is the 2nd time this has happened. Why create an online app that cant seem to be managed. Why am i having discussions about how your IT department is fixing the issue on One hand then being told that you cannot link my payment to my order?