Very bad experience,...

Very bad experience, I recommend two of my friends to buy cars at their dealership and I was supposed to get reward of 4k and now it's 4 month's and they not promising anything I've try to call them now they started to ignore my calls even the manager by the name if kobus I've been calling him but no luck of getting hold of him even try their head office they told me m, they can't help me due to its dealership agreements so please help me.