The facts are very vague here.
Is it a suit which was denied by the district court? If the district has suggested approaching the high court, then the case is outside the jurisdiction of the district court.
The 90 days statement applies to submit a "written statement" by the petitioner within 90 days. If the "written statement" is not filed within 90 days, the court shall pronounce judgement against the petitioner. However, the court can extend the deadline in exceptional cases after considering the facts.
I would recommend you to approach the high court within 90 days.