I think that some of your agency's services don't align with your question. About the services you are free to put whatever you want as long as you provide a good service that'll be okay, otherwise it'll be like shooting your foot and you won't last long.
I really think the design is good but you are not taking the most out of it. The text appears small — on some pages like About, Contact, Services) compared to usual websites so you have to read a lot to understand what this agency does. Take your homepage as an example, the headings sizes are fine.
Also in some pages there are a lot of blank space (gap) between sections or the main section and the footer (cf.
https://instamallglobal.com/services/) Make use of headings, some icons and headings would be usefull on this page as well.
You can try to use the same sections that you put in your homepage on other pages to bring them to life ^^
Also another thing is that you wp-content/uploads folder are exposed, it's always recommended to be careful when installing some themes, you can put an index file in these folders avoid any problems in the future, because some plugins can store some data in there, and database backups in some cases.