refactor: use correct functions name with respect to the corresponding filenames

[ullasgowda]

Description

Update the inconsistent function names exported from pages directory in these files:

src/pages/Company/index.jsx
src/pages/Customer/index.jsx
src/pages/Email/index.jsx

Related Issues

If this pull request is related to any issue(s), please list them here.

Issue-892

Steps to Test

Provide steps on how to test the changes introduced in this pull request.

Screenshots (if applicable)

If your changes include visual updates, it would be helpful to provide screenshots of the before and after.

Checklist

• I have tested these changes
• [] I have updated the relevant documentation
• [] I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the codebase
• My changes generate no new warnings or errors
• The title of my pull request is clear and descriptive

[salahlalami]

@ullasgowda thank you