Uncaring and disappointing service

I recently made an online purchase of a smart tv after searching unsuccessfully all over the internet for an affordable one. The order was to be delivered and the tracking status said the order was ready to be picked up from warehouse by the courier, now after 4 days of waiting for the TV so my kids can finally enjoy their favourite shows, I get a call that the TV is not available from nearby branches, they have to refund. How could their system fail to verify locations and stock availability in time instead of making me wait so long and have to deliver this disheartening news to my kids. Totally unacceptable and ruthless service!!!!