Lying Haval service department

My car's sunroof is broken. 3 weeks ago I took my car in to have it repaired. I was sent home with the broken sunroof as they needed to order parts and it would take 2-3 days. 8 days later I phoned to ask about the part, it had arrived. I took my car in to have it repaired. I was sent home with half a sunroof (only glass part in this heat) saying more parts are needed. It would take 2-3 days. It is 8 days layer and STILL NO ****** PARTS!!! Every time I phone it is one excuse after the next. This is ridiculous!!