Hello
I have checked your website and fully confident to fix the mentioned issues. I am an expert in Wordpress/plugins and have 5 years of work experience.
According to the requirements, surely I can make this website responsive and fix the issues in multilingual and setup the search functions.
Please share the details of which WordPress plugin you are using.
My skills: WordPres plugins, Woo-Commerce and it's sub plugins, PHP (OOP & other frameworks) JavaScript, in PHP5, MySQL, HTML5, CSS3, XHTML / DHTML, AJAX, JavaScript.
I am able to start working right away and will always keep you informing about the progress so that you can be in the loop and relaxed. I am really enthusiastic about the project.
Give me a chance to start work with your company. I will give you the best results more than your expectations.
Best Regards
Gaurav