googlebot – My site on google shows the previous site that I redirect to a new one

that has troubled me a lot,
my previous site is:
http://pokermania88.com
so I redirect him to:
https://www.mainkartu888.com

After several days, I check it on my webmaster, it seems that my new site has not improved at all. So I check this request:
info: www.mainkartu888.com
and the result still shows the site http://pokermania88.com, can you help me about it, I've been confused right now. Thanks before