Why buy at Dion Wired, they do not replace items

We bought a Lenovo Yoga at Dion Wired 21 February 2015. The PC went into sleep mode about 3 weeks ago. Friday we went to Dion Wired at Gateway only to send us to the Lenovo helpdesk. At this desk they said the USB port is damaged and they cannot do anything else, seeing that due to the USB port the PC got damaged and now it will stay in sleep mode. I must say excellent service. It's not our fault the USP port packed up. If you read online the Lenovo's are giving problems nonstop. Dion Wired sold us the PC, so they must get it fixed. Please look into this issue ASAP. Please go and read chapter 2 of the Consumer Protection Act, 2008.