Azimio leader Raila Odinga has given the government a 14-day mass action ultimatum if Jeevanjee's demands are not met.
Speaking during their prayer rally on Wednesday, the former Prime Minister said all they seek is electoral justice.
"We came here as seekers of truth and defenders of justice. We are seekers and defenders of electoral justice, social and economic justice. We pray that this may be firmly planted in the soils of our country," he said.
Raila demanded that President William Ruto's government lowers the price of basic commodities and taxes, in 14 days.
He said failure to do so, the Opposition will stage anti-government demonstrations.
"We’ve talked about the rising cost of basic commodities like unga, electricity, fuel, sugar and milk among others for far too long. We have complained about rising taxes and talked about children dropping out of school for lack of fees," Raila said.
"Withdrawal of subsidies to food and education in the middle of drought and famine was reckless and heartless. Consequently, the subsidies must be restored, and the cost of basic commodities and taxes must come down in the next 14 days," Raila said.
The ODM leader also called for the opening of the IEBC server and an audit conducted using a reputable firm.
"Failure to which, we shall lead the people to restore their authority and voice," he said.
He said the ongoing process of reconstituting IEBC must also stop immediately and a bipartisan team put in place to restructure the electoral body in a manner that ends its monolithic operations.
"If these demands are not heeded within 14 days we shall lead Kenyans into mass action across the country to have their power back and restore their country," Raila said.
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