Samsung S10e back separating

I’ve had my Galaxy S10e since 2019.  I noticed a couple weeks ago that the back of the phone is separating from the front.  It’s open almost down the entire side. (I can even see the “glue” used to attach the front and back). I didn’t purchase insurance on it so that’s an issue.  I’ve been on the phone all day in between talking to TMobile and Samsung.  Basically TMobile tells me “oh well, time to upgrade” and Samsung tells me it’s out of warranty, which I’m fully aware.  I’m 99.9% sure it’s the battery expanding.  When I try to “close” the back I feel something pushing against it.  Of course, I’ve been Googling this and it seems this is a pretty common issue with this phone.  Any suggestions?  Thanks for any help!  Lynn