Worst Mistake ever

Bought a Toshiba HD 3D Television from Costco online had to send it back for replacement after one week with sound problem got sent a new one after about a month same problem was told out of stock and they would contact me when in stock for replacement in the meantime I had to disable all the automatic sound system built into the TV. Never contacted me and nearly two years later the TV goes blank (no picture) contacted Costco and was told had no record of previous problems and would get a local repairer to contact me in about 7 DAYS. not to repair TV but to make yet another appointment to call and inspect TV. So now we have no working TV and ni idea when the repair man will call so we have to wait round the phone and twiddle our thumbs. Would have thought a company of Costco's repute would have handled things a bit better than this.....