Vodacom unable to trace an EFT payment into their public account

Due to a missed debit, I made a manual payment into the Vodacom, bank approved beneficiary account, prelisted listed as public beneficiary on the Discovery bank App. For some or other reason Vodacom is unable to trace the payment, I sent them the proof of payment and they then asked me to ask my bank, which account number, the payment went into. Discovery bank is unable to provide me with that detail, I suppose for security reasons. I am now stuck between two entities, but what is strange is a previous payment using the same method was received by Vodacom with no complications. I find it strange that they unable to locate this payment. I would appreciate if Vodacom could check the previous payment and see which of their bank accounts is linked to payments from Discovery bank, in order to check and trace the current payment. It feels like not enough is being done on Vodacom's end to find the payment.