Appalling service ....

I always pride myself with service received from fnb,but my last query you have failed me dismally.For the first time in a decade I am very very dissapointed at the service I received.For days been enquiring about a payment I made because the recipient claims it did not make it to her account.First consultant said it will reflect later that day around 17:00,Friday 18:00 I enquired,the other consultant said midnight,Saturday I enquired the other consultant said it will reflect on Monday.Tuesday I enquired,back and forth with different consultants till they transferred me to digital,digital transferred me to missing payments where they launched an investigation. Later in days they sent an email just saying the payment was processed on the 31st July.It is the 11th August I'm still enquiring..I asked for proof that the payment went through because the recipient is still denying,the consultant is still lost as to what I'm talking about,although when they come online they say to you 'Give me a minute to go through your conversations '.So I'm asking FNB if a recipient says she did not receive a payment, but money left my account,What am I supposed to do,how is FNB as my bank helping me in this regard,or is it just folding hands saying No the payment went through, remember I cannot access the recipient's bank account to be 100 % sure that the money did go into her bank account.Fnb Provide a solution please.You cannot just say there is nothing you can do to assist that the payment was made.I mean if this is the case,How am I supposed to trust that I have your backing with huge amounts of money, For God's sake this is my main bank,which means I process every payment here