Disappointed deeply

I ordered a stove on the 25th of November and was told delivery would take place 12 December and then moved the delivery date to 6th December, but after several calls, emails and requests to speak to a manager I still have no idea what is going on with my delivery. And I am very angry every time it's a different excuse or someone else fault and still no idea what is going on and no manager has even bothered to call me.