Is that how you treat your customers?

I wrote a complaint yesterday to Fnb because my friend made an ATM deposit to pay for rent on my behalf and lost the slip.My landlord was looking for the proof of payment and was saying I did not pay for rent.My friend went to Jubilee mall Fnb to ask for a re-print of the slip and they told him that \ they want a slip for them to be able to do a re-print". I got the help at Industria FnB in Johannesburg. So today I receive a call from Jubilee Mall from a rude guy who addressed himself as Phistos. He was using a very disrespectful tone to me and told me that next time if I have a problem I shouldn't send other people "