Poor assistance from Rain

I made a payment at pick n pay today however the teller put a 2 instead of the 3.l then send my proof of payment on their WhatsApp number but l was told to avoid disconnection l must make a another payment while they resolve the allocation of my payment.How when they already have my payment.the receipt actually says rain though the reference is the one which is wrong .There is no way l will pay R1019 x2 in one month..Am being told the support need to investigate. INVESTIGATE WHAT WHEN I GAVE YOU MY RECEIPT AS PROOF