Hi, have you try banana peels ? My roses were in misery a couple months ago because of the rain and lacked of sunshine. Then I fed them banana peels (just planted the peels in the soil), only a few days after that, they grew some new leaves and new buds too. I water my roses every 2-3 days, only when the soil looked dry (my potted roses are protected from the heavy rain). Maybe your roses have too much water since they stay indoor and the soil need more time to get dry, they also need good air circulation.