Bad Sales Services and aftermarket assistance

I purchased household appliances from Hirsch's with the understanding that i would not be using them for a few months. One of the items i purchased was an LG fridge for a large sum of money, I was informed by the salesman that the water and ice dispenser could either work via the bottle in the fridge or alternatively it could be plumbed in. When I tried to connect it to the plumbing I was then told by Hirsch's that actually we cannot do this. I then called LG and they confirmed that if it has the dispenser inside it cannot be connected to the plumbing - completely opposite to what the sales person told me.

When i confronted them about their incorrect information they told me that did not say this and it is not their problem. They then offered to trade the fridge in for less than half its value which is shocking as it is a brand new - never been used before appliance.

I think they way they have handled this whole situation is shocking and the fact that no manager has even attempted to assist or apologies makes the situation even worse.