Search engine listing preview stays unchanged.

[Thushara]

I use Debut theme for my store. First I have added a product and edit the search engine preview and it has shown in google as it is. But after a while I changed my mind and deleted the product. Added a different one and changed the Search engine listing preview accordingly. But now it doesn't change in google. It remains the same listing even though I tried to change it and save. I'm totally new to this. Please help me.