Bad service from CNA in Quagga Centre

I bought a telkom 1 gig Data at CNA in Quagga Centre PTA West. The voucher pin was not working but it was active showing that it was not used. I phoned Telkom to get assistance from them and they couldn't fix the problem and send me back to the store for a refund. I went back to CNA for a refund and Angie the Manager had the worst attitude and refused to speak to a Telkom Consultant whom i had on the phone when she asked to speak to the manager so that i could get my refund. I ended up having a screaming match with her for my refund. The worst service i ever encountered.