My Toshiba 50-inch Android TV Not Working Properly

I've been using the Toshiba 50-inch Android TV that I bought last year from the A101 store in Batman. However, I've been having trouble accessing TV channels since I purchased it. I'm bombarded with applications as soon as I turn on the television. I try using the remote to change channels, but it doesn't seem to work. I turn off and on the TV, but it's in vain, and a significant amount of time passes. I sometimes unplug the TV and plug it back in, waiting again because changing channels consumes so much of my time. It's infuriating. Sometimes I just give up and turn off the TV because, after finally changing channels, it returns to the application section. This whole ordeal is wearing me down to the point where I want to smash the TV. It irritates me. I chose Toshiba because it is a well-known brand, but I've never had such a problem with any TV in my life, even just trying to access channels. When I turn off the TV, it automatically turns back on. You get the picture: my sanity is crumbling in front of the television, and if this continues, I might just snap. Please help me; I'm in desperate need. I chose Toshiba because I know it's a dependable brand; otherwise, there are numerous cheaper TV brands available.