I bought Note20ultra 9 days back as it get too much battery draining I visited services center 4 times till they haven't fix the issue they kept my phone with them and when I try to contact them  more then 20 times they not even responding the call ....

I brought Note20 ultra 1 week ago from day one iam facing too many problems and now I don't understand why my  phone is vibrating alot suddenly as it is a flagship phone why samsung u are doing this I very pissed off . Battery   backup also  I'm ...