Poor service that I never experienced before

I went to spar in highflats KZN to do a instant money transfer, and a Cashier made an error on a sender cellphone number so the sender didn't receive the message, and I went back to the shop to ask for refund or resend they told me to call STD bank when i call them on my expenses they told me to go back to spar, I went back to the shop and they took me up and down, left and right they even told me that I lost my R510 they can't help me if STD bank can't help me, bit I insisted to the manager to call STD from the shop and we called them they told the manager to send an email to them so that I can be refund he took my banking details my numbers because it's was Saturday he promise to give me a call on Monday but I had to wait two weeks with no communication, and that money was my child transport to school now it's been more than three weeks my son is not going to school, I log the complaint to their website and I was responded by the lady with a name of Luyanda she referred me back to STD bank, and I log another one and told her that we already myself and the Spar manage which was an indian guy spoke to those people and he promise to refund me within 48hours, that was three days are go she promised that she will investigate and resolve that issue and comeback to me on Thursday and never came back to me I sent her an email she never responded to , now I don't know who must I trust at Spar because from the retail level of service to the customer care department they are the same they all have poor customer service they don't keep their promises, even be I'm still waiting I don't know for who but I want my R510 back I even spend a lot of money trying to resolve this issue with no success.