Complain railway furniture

My mom ask me to pay her account on her behalf because she been admitted at hospital,I have take her receipt to pay her monthly installment for R700,00 the cashier was polite ,he was nice to me,he says to me Bongani call your mom and the angreement was R1150, go to that table the will call head office that you have R700,other lady was busy with customer ask kotlaone to call Bongani , kotlaone told Bongani that I have R700, Bongani says something back to a lady ,a lady laughed back looking at me ,and say Bongani need want R700,and I say to a lady my mom never make that arrangement of R1150,cause the time a lady she on phone I call my mother,she disagree everything,that Bongani say , Bongani told a lady that she frozen my mother account and they can accept the R700 the want R1150,a lady give phone I speak with Bongani he had bad attitude act like he is the owner of of store,I leave store call head office ask to speak with Cynthia , Cynthia says my mom agree to pay R1150,I say to her your phone system record conversation between customer she say her head office don't records, conversation I ask ask her when you call customer you say everything is recorded for security,she refused she say not at her work ,she even say I'm must apologize on behalf of my mother Couse she don't have that R1150,I refuse ,she transferred my call to Bongani he say I'm apologize,cause I can pay my account if I don't apologize ,I told him I can cause my mother never make any arrangements of money,but I managed to pay this Bongani guy he act like he own store