Home Page Title

Hi,
I’m getting an issue with my website home page title. When I add a new blog post then the title of that post becomes the title of the home page and it remains changes with every new post.

I need a fixed title for home page and don’t want blog post title as my home page title every time.

Here is the link to my website
https://www.bestprepaiddebitcards.com/

Please let me know what should I do to fix this issue.

Thanks in Advance.