Inconsistent service from Decofurn Northriding

I bought a few items from Decofurn northriding and I paid for delivery. When the delivery came the next day at 7pm (after being told delivery would be between 11 and 3pm), 1 dining chair was missing and they told the delivery guys they ran out of stock even though they had assured me everything was in stock. I’ve called the store 4 times to deliver my outstanding chair and every time I keep hearing the same story ( the driver was given the chair, and they don’t know why they didn’t deliver). After 3 weeks I’m still waiting for one chair which I paid for. No one has the courtesy to even let me know the chair can’t be delivered because of whatever reason they have. To just tell a customer the driver was given the chair and they don’t know why they didn’t deliver more than 2 times shows how unbothered their management is. This was the first and last time purchasing from this store. They have horrible aftersales service.