Nokia 3500 C — Poor NOKIA CARE CENTER

I am very upset to get the poor service from the NOKIA care center .There was the restarting problem in my device. Today I went to NOKIA care center ( Star Communication 4887/7 , Near Nanki Gurudwara, Opp, Kangan Banquet Hall, Dilshand Garden , Delhi-110095). After checking my device, they suggest me that there is software problem. So software will be installed and the charges will be Rs, 350. They issued me a Service Job Sheet in which they have mentioned the Restart Problem and the Total payable amount is 350 . That's is ok. But after 2 hour i got a call from the NOKIA care and they told that there is some other problem , the IC is fault also .So now you will have to pay total amount Rs. 750 . My Job Sheet No is 295. Can i get a positive response from your end? Is it good to treat like that from a reputed brand? Please find herewith the attached Service Job Sheet which NOKIA care center has provided me.