Help! I have to drain the cooling water at my Manta B, because it is not frozen under zero

I have an urgent problem: I noticed yesterday that my cooling water freezes below zero and my workshop only meant that I could do that with the draining myself. I can’t do that. I solved all the bells earlier, but the hoses are hard like stone, they can’t be pulled off. What else is there to do? It’s in an underground garage, but it’s supposed to be up to minus 12 degrees the days. I’m just getting full on the hose as it goes on now. or other workshops will certainly not bother to go there, towing service had once made me a scratch in the car. I can not do that either. What else do I have for possibilities? cut all hoses through? or does this even bigger problems? I could then fill nothing more with frost protection