Corporate WordPress Migration & DNS Fix

I need my corporate website, currently running on WordPress, moved to a new WordPress host with zero visible downtime. Alongside the move, several DNS records need cleaning up so that the domain, sub-domains, SSL and email routing all resolve correctly once the switch happens.

Here is what I expect from you:
• Full site transfer – files, database, and any custom configurations – to the new hosting environment.
• DNS record audit and repair, removing obsolete entries and adding the correct A, CNAME, MX and TXT records for the new server.
• Propagation monitoring and a final check that the live site, SSL padlock and email all function exactly as before.

I will give you cPanel (or SSH/SFTP) access to both hosts plus registrar credentials for DNS updates. Please confirm how you plan to back up the site, limit downtime, and test success before handing over.