Payment not reaching account

An amount of R300 was paid per EFT from a FNB account to Edgars (also FNB) on 2 Jan 2015. Edgars keeps on telling me that the payment does not reflect on their statements. a Copy of their FNB statement showing the amount on their banking account was sent to them by FNB York st George but still they claim that the amount does not reflect. My account has been frozen with a embarrasing remark by their cashiers in front of other clients that I must pay before I can buy.