Here are simple ways to say it in Hindi (past tense), with gender variants:

• If you are male speaking: "आशा करता हूँ कि आपका पार्यूषण पर्व अच्छा रहा।"
• If you are female speaking: "आशा करती हूँ कि आपका पार्यूषण पर्व अच्छा रहा।"

More formal or slightly warmer:

• "आशा है कि आपका पार्यूषण पर्व मंगलमय रहा और आपको सुख-शांति मिली होगी।"

Notes:

• The verb रहा is used for masculine speakers; रही for feminine speakers.
• You can keep "पार्यूषण पर्व" or use "पर्व" as you prefer.