Fix WordPress Plugin Compatibility Issues

I run iheartlimotransportation.com and, after recent WordPress updates, three key plugins have stopped working—the Contact Form 7 form, our custom reservation form, and the header slider. I already updated Contact Form 7 to its latest version, but the form still fails to load or send submissions.

Here’s what I need:
• Bring the entire WordPress install, theme, and all plugins up to the current stable release, using a safe workflow (staging site or full backup first).
• Diagnose why the contact form, reservation form, and slider are incompatible, then repair or replace each so they display correctly and function on both desktop and mobile.
• Ensure form submissions deliver emails reliably and, if possible, store entries in the dashboard for easy reference.
• Verify that the header slider renders smoothly on every modern browser without breaking site layout.
• Hand off a short report outlining the changes, versions applied, and any future maintenance tips.

I’m looking for someone who can jump in quickly, resolve the issues without disrupting live bookings, and leave the site fully updated and stable.