So I purchased a handset from T-Mobile and after about I'd say a month or so I started noticing that the phone was doing things that I wasn't controlling and that I hadn't programmed into the phone I feel as though my personal space has been invaded completely and I'm looking for suggestions
Neither T-Mobile nor Samsung gave remote access to anyone on your phone. If things are happening on your phone that you are not controlling, it's because you either downloaded a malicious app, clicked a malicious link, or your accounts have been compromised by someone who has your passwords.
Unless you mean apps being installed, which is part of your agreement with T-Mobile if you have a carrier locked phone.
Windows control of android phones is a big problem. Android phones are hit by hardware intrusion which Samsung will have to explain to you. Once they get windows control they can mirror your screen and control everything on your phone. Samsung should have never allowed windows control of android devices.
I have an S24 Ultra which has been hit several times. All public domain devices have this problem. Samsung needs to fix it phones are way too expensive to have this problem.
Samsung phones have excellent security. If you've been "hit", it's more likely user behavior than any weakness in the security. Of course, security only works if you turn it on. Have you turned on App security? Have installed protection apps? Have you immunized your Windows computer? If you are allowing Windows control of your device, that's user behavior and permissions, not Samsung's.
I use all the Samsung security apps and settings. Software does not stop hardware intrusion. I know 13 level 5 military IT experts who have told me that public domain devices can not block hardware intrusion. 64 bit encryption does not block hardware intrusion.
