I'm guessing that OP didn't respond to discovery within thirty days, and a motion to compel and for sanctions was filed.
I'm further guessing that OP then answered the discovery.
The motion may, or may not, be moot. For example, the other side might still be complaining that the discovery was incomplete. Or they may want their costs for forcing OP to comply.
OP - call the other side and see if they are willing to pass the hearing because the discovery is filed. If they say they are, send a letter confirming your understanding by fax so you have a written record.
If they won't, or if you can't reach them, attend the hearing, since you never, never miss a hearing. Be prepared to explain why you ignored a court deadline, and be prepared to explain why the discovery answers are complete.