Call number on top & product image missing

[Bizbell]

Dear All,

Its really hard for me to handle Prestashop, ready many posts here but no answer was clear. I am using Prestashop 1.7.69 I want

1. Phone number in the top menu at left side 
2. When I open product page, image of product is missing on all products. Pls guide how to fix in easy way ( In past for some file change issue I replaced new theme folder with old one )
3. I want to disable mobile view and want to show my site same as on desktop.
4. I want to remove footer blank area and footer widgets completely. ( Just copyrights should remain ).

That's all I want to do, please please help me in very easy way.