If you're represented by private counsel, you should ask that attorney to seek a continuance with the DMV. You should beware, though, that even "beating" the charge in court does not guarantee you that the DMV hearing officer will reach the same result.
Special laws apply to refusal cases. The DMV hearing is independent of the court matter. Even if you win in court, that will have little to no effect on the DMV hearing.
You have an absolute right to be represented by an attorney at your DMV hearing. If you have not secured an attorney on the date and time your hearing is scheduled for, you can request a brief continuance to secure counsel. This are generally granted by the hearing officer assigned to your matter.
Quite simply, hire a lawyer that knows what they are doing, especially given your already incorrect statement about winning in court and then taking it to the dmv!
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