Faulty systems and useless customer care

On Sunday the 17th of April, I sent money to my sister via send imali. She did not received a pin. She did the whole *120 thing and requested a pin, and it send the voucher was sent, but still she received no message. I then initiated a chat on the app, and Nokuthokoza assisted me and literally said there is something wrong with my sisters network! I told her the issue is Nedbank's systems. 3 days later and we still cannot get a pin. I need a pin to be sent to her or the money reversed asap. I cannot be waiting 30 days for a fault that's not mine.