Google Ads Lead Tracking Setup

I need an expert to make sure every lead that submits a contact form or calls the telephone number on my website is recorded as a conversion inside Google Ads. The site already receives traffic from active campaigns, however the conversion trigger / tags that are set up dont seem to be correct (I am getting daily conversions however the amount shown in google ads is way lower than in reality).

Here’s what I expect:
• Install or refine the Google Ads conversion tag—either directly or through Google Tag Manager—to fire only when a contact form is successfully sent or when a customer clicks and calls the telephone number shown
• Verify the trigger works across all form variations and on every device.
• Confirm the data flows through to my Google Ads account and appears in the “Leads” column with no mismatches.
• Provide a short note or screen-share walkthrough showing exactly what was changed so I can reproduce it in the future.

The site is built on a standard CMS with no unusual restrictions, and I can give you admin access to the backend, Google Ads, Tag Manager and GA4. If you have a straightforward way to test form submissions without spamming my inbox, even better.

I’m ready to start as soon as you can, and I’ll be available to supply whatever credentials you need right away.