Mowed down

I have no green thumb. However, I do love flowers. Aaron gives me flowers sometimes for no reason but to enjoy them. This spring, our front yard was blessed to have tulips growing by the steps that lead to the house. Since I no absolutely nothing about flowers and they were beautiful, I left them alone since I didn't want to run the risk of becoming a flower killer. Amazingly they lasted a great while. However, this morning I discovered that the guys who mow our lawn (this is part of our lease agreement) mowed them down!!! I have no idea what to do. I feel bad that they wrecked something that someone worked hard to grow. (I'm guessing the house's previous owner planted them, becasue I have no idea how else they got there.) So, to my friends out there who are gardeners, my question is. Are they(the tulips) gone for good?