Given a box for a house?

We just packed up and left our lifelong hometown to move to a remote mining community for husbands work. We visited this town in July of last year and the company showed us around including several houses at the same time telling us that we would receive a 3 bedroom house of a similar standard to the ones we were shown. The houses were perfectly fine so I agreed to move up here with our daughter, 12 hours (or $500 air fare) from our families and not another town for over an hours drive. So we arrive here and we are given ONE set of keys to a DUPLEX (3 tiny bedrooms) with no back yard and in very poor condition and are told we have no choice and we have to sign the lease. We have tried to talk with them but they say that the new rules were ped a couple of months after we visited last year and that for equality's that crappy **** hole is what we have been allocated. This is a BIG company and if we want to move back to our home town we have to pay all moving costs plus reimburse them