First, you should not expect a car accident lawyer to guarantee a specific outcome for your case. The outcome of any legal matter depends on the specific facts of the case, and no lawyer can guarantee a specific outcome.
Second, you should not expect a car accident lawyer to provide you with legal advice unless you have hired them as your lawyer. Before you hire a lawyer, you may be able to discuss your case with them and ask for general information about the legal process, but they will not be able to provide you with specific legal advice until you have entered into a lawyer-client relationship.
Third, you should not expect a car accident lawyer to take your case unless they believe they can help you. Every lawyer has their own criteria for deciding which cases to take on, and some cases may not be a good fit for a particular lawyer. If a lawyer decides not to take your case, it does not necessarily mean that you do not have a valid claim or that you do not have a good case. It just means that the lawyer does not believe they are the right fit to help you.