In many states if you refuse an evidentiary breath test you will receive a license suspension/revocation regardless of what happens with your criminal charges. The fact that they issued a notice of suspension only confirms that your state is one of them. I would suggest contacting a local attorney to assist you with these matters.
Before making any decisions you should consult with an experienced DWI attorney. There are many good ones here on AVVO. Give one a call. Keep in mind that your time frame for contesting a license revocation and plate impoundment is 30 days from receiving those notices. Good luck.