This is not the most pleasurable situation. Just don't do anything by yourself, the snakes can be poisonous, and there is a probability that you can harm yourself. Just leave this job to a professional. I am sure that there is a sort of wildlife removal company in your city, that can help you. I remember when a raccoon entered my attic, I called the guys from
raccoon removal, and they helped me with it. So you decide in the end, but I really hope that you will listen to my advice. Good luck my friend, be careful.