Bad quality. Review on Micromax Canvas Tab P480

Recently I purchased the Micromax Canvas Tab P480 in the month February 2016. I am so happy the performance of this Micromax Canavas Tab P480 it is in better condition but now I noticed that it doesn’t open display setting in the setting menu, when I trying to open or clicked on display setting then it show script and write on the script is "display settings is unfortunately stopped". I have tried so many times to open display setting but its not worked. I went the service centre they told me its motherboard problem please come after 15 days but when I went after the 15 days to receive my Tab they not given. After consumed 35 days they given me but still I am not happy with this Tab it’s I can open display setting but performance of the tab is became slow. So I am not happy with this Tab as well as Micromax Service Center.