Unable to cancel moneygram transaction with FNB! Highly frustrated!!!!!

I’m extremely disappointed with the service received from FNB moneygram service. On Saturday 8 February 2019 at 9am, I completed a money gram transaction at the ATM (Florida road branch in Durban). An hour later my beneficiary advised that they are unable to collect the funds and that I need to cancel the transaction immediately. I called FNB customer services several times on Saturday - including premier banking- and no one was able to assist. I kept being pushed from pillar to post. I was then told to contact moneygram directly as cancellations cannot be done with FNB. This has been a highly frustrating process and Iv not been successful in cancelling same. I find it strange that FNB is happy to facilitate the Moneygram transaction yet they are unable to cancel moneygram transactions! Surely this should be included in the moneygram service. Can somebody from FNB please help me with the cancellation- as I have used FNB institution to facilitate the transaction.