Who will pay for deductible fee? the tenant or landlord? if the toilet fixture worn down?

My toilet bowl leak. When I saw the leak, the leak is from the back of the toilet bowl which is between the tank and the bowl. This occurs directly after I try to flush my toilet. I didn't notice any blockage because I couldn't even able to flush it since the flappers is broken. I'm pretty sure the leak is not from the top of the bowl or cause by the blockage because the water level on the toilet bowl is not high enough to cause any overflow. After i saw the leak from the back of the toilet, I immediately shut off the water source. I was also in a hurry at the moment. So I didn't call the plumber or notify the apartment. That night, i also didn't stayed at the house since i stayed at my friend house. since i thought shutting off the water source will solve the problem, and before i leave no more leaks. But in the morning they called in, and say that there is water intrusion coming from my apartment which damages other units below. The landlord called a plumber the next day and he keep