Apple India — about apple service center

Address: Jaipur, Rajasthan, 302033

I’m too much in trouble and very disappointed with tresor service. I have iphone x and i’m facing an issue (Unexpected restart and screen freeze) since a long time. I visited apple authorised service centre many times for solution but i came get any solution. Service agent behaviour is very bad and, they does not compromise on anything. I’m still in too much trouble. I tried all way for solution.