sold a new tp link when sim card was faulty - Consumer Complaint for INCREDIBLE CONNECTION - HEAD OFFICE

I took my old tp link in to incredible connection watercrest mall i was told the machine was faulty yet the tech only tried it with my sim card and he said teh machine was faulty yet i bought a new tp link and when i inserted the sim card it wouldnt work the technician who installed the machine for me said the sim card was faulty not the machine and they kept my old machine so basically i spent R2200 on a new tp link when there was nothing wrong with the old one