If you are offered a contract that includes a bond and you sign it, regardless of your type rating situation, then you have entered into a contractual agreement.
If you now choose to break that contract why should you expect the company to give you a reference? You broke your contract and they won't be in any hurry to uphold their side of the contract since you are already in default.
Eventually they may give you a reference but not before any future employer has raised their eyebrows and investigated the circumstances of your departure from your previous employer, just basic good common sense, employers may be in competition but they also stick together.
Either don't agree to a bond or don't try to break it. The legal aspect is immaterial, all that matters is your continued employment with better and better employers, without collecting a bad reputation on the way.