WordPress Expert Needed to Replace Contact Form 7 and Fix Email Delivery

I need an experienced WordPress freelancer to replace Contact Form 7 on my website with a simple and reliable contact form and fix email delivery so all submissions are received properly. This is a very basic form. I do not receive many submissions, so I am not looking for anything fancy, advanced, or complicated. I want a simple, lightweight, reliable solution that is easy to maintain. I prefer a free plugin. Please do not install any paid plugin, subscription-based service, or unnecessary extra features without my approval first. Scope of work: Replace Contact Form 7 with a simple free plugin Set up SMTP or another proper email delivery method Test the form to make sure submissions are sent and received correctly Check for plugin, theme, hosting, or email conflicts Make sure the form works properly on desktop and mobile Please keep the solution simple and practical. When applying, please include: Your experience with similar WordPress form and email delivery issues What simple free plugin you would use Your estimated turnaround time I would also like to have a quick video call through Upwork with the right candidate before starting. This is a small fixed-price project. I am looking for someone reliable who can fix the issue correctly the first time. Thanks Oliver