Trying to remove the lock yourself without the proper knowledge is extremely likely to result in further damage and increased costs.
Your best and most practical option is to:
1. Call a reputable auto locksmith: This is the only safe and legal way to get a new key made without damaging your car. They have specialized tools and knowledge to bypass the lock system without causing significant damage. Expect this to be the most expensive option, but it avoids potentially high repair costs.
2. Contact your insurance company: They may be able to assist you with getting a locksmith or covering some of the costs.
Trying any other methods risks further damage to your car and could even be illegal depending on your location.