Momo mobile money

HelloPeter i need your help urgently,i cashed in R1500 on my momo account last week Saturday cashed out using Nedbank cash send, it didnt send me voucher number and pin as it used to. On Tuesday i contacted MTN they told me money will reflect back to my account within 3 days, i called them again today they telling me to wait up until Sunday. I cant wait that long because im using that money for my business since its approaching weekend. The reference number they gave me its 6448211. Its not the first time im experiencing this issue,please help.