Game store playing games with customers!

I bought a gas stove on Saturday 7th September for R9500 paid for delivery on Monday 9th. They promise to call before delivery because it’s a work day. Today at 13:00 I got an sms saying I must ensure someone is home to receive it between 13:30 to 15:30. I left work, rushed home and it’s now 16:00. I have called multiple times and they keep saying that the drive is on the way. My home is approximately 5km from the store! I have missed 4 hours of work and missed my meeting which was supposed to be at 16:00. This is extremely upsetting! ????????