Nokia India — nokia 5.1 plus

I submitted my nokia 5.1 plus to a service centre, named as sai solutions, at kotla mubarakpur, new delhi-110003. The submission date is 11/01/19, the target delivery date is 22/01/19; i went there on the given date. The lady at the service centre made an excuse we don't have parts, we will give you by 27/01/19. I called that lady again; she said we will give your mobile by 3/02/19. Now, i am suffering, my work is suffering. I want my mobile. The job sheet no:[protected]/190111/013. It"s 15 days. They doing all this because my mobile is under warranty. Never buy a nokia product again.