Dear sir, i have read your brief and i am ready to help you setup SSL certificate and move entire website on https, and also fix the contact form issue. i am wordpress expert. i will quick fix this issue. it's very simple job for me.
After proper setup the SSL issue you will see Green padlock icon on browser that means your website is fully secure and SSL is properly configured with the website.
if you want we can discuss more on chat.
My skills are:
Wordpress,Woo-commerce
Wix,Shopify
PHP, Codeigniter, laravel
HTML5,CSS3, Jquery, JavaScript
Thank you very much in advance!!