Ijivitari MP David Arore, who was negotiating on behalf of the relatives told Loop PNG this morning that the seven days ultimatum will lapse this Friday.
The relatives presented the compensation demand to the company on Saturday.
They are demanding K50 million from the company.
Meanwhile, Arore said the mass burial will be held tomorrow.
The road accident happened last Monday which claimed 13 lives.
The incident involved a PMV loaded with passengers and an Oil Palm truck.
On a positive note, Higaturu oil palm workers have contributed K70,000 and 13 truck loads of food to the relatives of victims. Workers contributed K20 each, while food was contributed in kind.