Missing payment, days without acknowledgement or feedback

I settled my Woolworth store account through via the means of EFT. This payment was done on the 27th of May, payments usually take about 48hrs to reflect on the app so I grew worried when I didn't see any change reflected. I checked my bank statement to confirm I had paid the correct beneficiary which is when I discovered my error, my reference had reverted to my name instead of my store account number. I spoke to a consultant who referred me to missing payments, I sent them the email 2 days ago and have yet to receive any acknowledgement let alone feedback. I don't want this to affect my credit and it would be lovely to get some urgency from Woolworths.