do you still have coins ?

don't change the pvt key, ( you cant change).   Create a   ''NEW'' ETH adress, and send your coins the new wallet. its more safe,



BEAWARE: there a lot of fake myetherwallet.com like this; 

myetlherwallet.com
myeltherwallet.com

they are fake and dont create and send your coins on these sites. Also your friend can be scammed too. don't enter Mew from advertisement link. there are tons of fake link.

JUST use original myetherwallet, stay calm but be fast