Greetings,
I can upgrade and modify your website regarding your requirements but before this, you have to share the source code so that we can understand the complete scope of the project and can start working on it.
I am a senior web developer with 14 years of experience in my domain I have extensive knowledge of html5, css3, javascript, ajax, jquery, bootstrap,SEO,Laravel and in all CMS like wordpress, MAgento ,Joomla,graphic designing, photoshop,illustrator etc
Note: As I have to work on an existing project so I'd prefer to go with the hourly rates.
Ping me so that we can discuss it in detail,
Many thanks,
MaryamGull