I understand that you have an emoji that looks like ellipses, but when you press it, it enters some other text. I'm happy to provide some help for this issue.
Based on what you've mentioned, check out the text replacements on your iPhone and see if you have this configured there:
How to use Auto-Correction and predictive text on your iPhone, iPad, or iPod touch - Apple Support
Set up text replacement
With text replacement, you can use shortcuts to replace longer phrases. When you enter the shortcut in a text field, the phrase automatically replaces it. For example, you could type "GM" and "Good morning" would automatically replace it.
To manage text replacement, tap Settings > General > Keyboard > Text Replacement.
- To add a text replacement, tap , then enter your phrase and shortcut. When you're done, tap Save.
- To remove a text replacement, tap Edit, tap , then tap Delete. To save your changes, tap Done.
Thanks for using the Apple Support Communities. Cheers!