Warranty ignored!!

Late last year I purchased a Lenovo laptop for my son for school on takelot. A week or two after the 6-month guarantee ended it just stopped working. I sent it back to takelot, who sent it to Lenovo as it has a further warranty. Lenovo claimed there was physical damage to the device, which negates the warranty. Takelot returned the device to me. I sent it to be independently assessed, and this assessor says there is no sign of physical damage, but that essential working parts are now missing. Takelot has not responded to further emails on my side. Terrible service as this was a costly device, with no help given to the consumer for a defective product!!