Not responding to my email about my proper allocationn

I received an sms from *** I sent a whatsupp requesting my bank balance after a week there was an sms stating the I have not paid the R700 as promised of which I paid on the 3rd of February 2020 when I sent an sms to verify the reference number which they gave me *** belonged to Sandra not me.Please rectify this I paid into this *** referrence an amount of R700 instead of ***.