How can I fix my screen?

The question is somewhat simple but I don't want to go ahead and ruin anything on my phone.

I had the screen replaced time ago, and now the bottom right corner is coming up, and I would like to know if there is an easy way to fix it, since I don't want to send it to repair again, and I don't have the skills to disassemble it.

I have read that some kind of glue can be used but I don't know.

Would greatly appreciate any input on this matter, thanks