Bad service at Nedbank

Hi there,<br> <br> I own a company where my customers use cards to purchase goods from my shop. 2 weeks ago the machine started having faults. when i took it in at the hyde park branch firstly i was given attitude by the sales people there, next i have tried reaching out to them on social media but no one has rep****. i am being told i have to pay for a new machine yet they did not tell me what is at fault here. the machine does not belong to me, i pay a fee every month to have it, it should be their responsibility to fix it as i did nothing. I am angry because i am lossing business due to this.