I checked and you need to do the following quickly:

1. Your family and friends and the center should recite the Heart Sutra and the Diamond Cutter Sutra as much as you can.
2. Do Tara puja and do it very well, with very strong prayers to Tara for success.
3. Make offerings to Ksitigarbha and strong prayers to Ksitigarbha. You and your family can do this.
4. Request Gyuto Tantric College to do Drugchuma puja eleven times. You can ask Geshe-la to call them and arrange this.