Pruning is not the problem. It's keeping it in the house that's causing them to die. Roses are not house plants...EVER! These little gift minis are grown and sold as florist roses and the growers actually mean for them to be disposable. That's not to say they need to be. They're regular roses and if planted out in the garden and given proper care can and do grow for many years.

For right now you need to just remove all the spent blooms, nothing more. Put it in the most light you can find in your house. Find a tray of some kind (I've used cake pans) and fill the bottom with pebbles. Put water in the pebbles to just below their tops and place the pot on top of the pebbles. You do not want any water to be touching the bottom of the pot. This will raise the humidity around the rose without over watering it. Be careful to keep it just damp and never soggy wet. Hopefully you'll be able to keep it going this way until spring when you can get it outside. It will do so much better out there.

Ty you very much for your fast response this will be my next step thanks again