Won't deliver on time for township clients

Dial a bed wanted to deliver after 18:30. I got a call from the delivery guys that they are on route at 18:30. I bought many beds from them and there's a clear pattern that when the delivery address is Soweto they want to deliver at 17:00 and not earlier. When it's my Sandton address they are on time. You can't make this up. If you are from the township buy a bed elsewhere, trust me.