Countrywide Truck Sales : Selling an old filthy tanker as brand new!!!!

I bought a 3000 liter diesel tanker from Countrywide Truck Sales. It was advertised as a brand new tank on it. Cash sale. On taking ownership of the tanker it was found that the tank is old, filthy and rusty, has contaminated 3000 liters of diesel, the pump was faulty and back to front, among other faults. They do not return my calls or get back to me with any solutions, they refuse to take my calls. I have no alternative but to go the hard route through lawyers and sue for everything. Will take longer and be more costly than if they had responded decently, but they seem to be shysters and refuse to even take my calls. I have seen another bad review for them as well. I would advise everyone to stay away from them. They do not seem reputable at all. A serious no-go company.