I wonder if I can get my money back and how could I do it. thanks

It seems that it has some margins by default that do not allow the full width mode. On PC, the full width works well but I need it on the cell phone. when I put negative margins on the right or left it seems to work but that is not a good practice. I have tried almost everything and something so simple does not work

I want all the recent articles, more pupular, in the posts, etcs … the images of the complete site are seen in full with and the text with a little margin.I would like to know if that is possible.