Online purchase

I have bought on vodacom online on 07/04/2019. I paid with my card and was invoiced with the order number. The next morning, I received an sms stating that my order was cancelled and if in error I must contact ********** . On contacting the number I was told to contact online as they are off line cannot check for me. I called the number given and was advised to send an email to **********

I have sent an email and have since awaiting for feedback - there is not even an automated email acknowledging my query. I called again and was told they are off line and will call me back. My money has been deducted and the cellphone was for my son's birthday which I need to get as in yesterday. Please vodacom send me a cancellation letter so I can send to my bank for reversal of my money.