mobile layout not responsive

I created a very nice email on desktop but unfortunately on mobile it looks bad. Specifically, I added a 4 column layout but on mobile it shows the columns the one below the other and left aligned. I attach screenshots. I would like to keep the columns in one row also in mobile or at least center align them or better select two have two columns on one row and two on a second. In any case, it would be great if we can customize the mobile view.