The Independent National Electoral (INEC) had declared the election inconclusive on the grounds that election did not hold in Ihiala Local Government.
Professor Chukwuma Soludo has the highest votes in the election, having secure victory in 18 of the 20 LGAs where election held.
Although Ozigbo secured the second highest votes in the election, he won only one of the 20 LGAs where elections held.
Addressing newsmen on the eve of the supplementary poll, Ozigbo said the election battle is not yet over.
According to him, there over 248,000 votes at stake in Ihiala and other places where election did not take place.
There are 148,407 voters in Ihiala, the only LGA where INEC said election has not held.
In his address, Ozigbo appealed to the people of Ihiala to come out en masse and vote for PDP.
He lamented the impact of vote buying which he described as a major issue in the polity.
Ozigbo said as a party without the control of public funds, PDP could not have bought votes.
However, he said he was only concerned with the complementary election at the moment, adding that he would decide on next line of action after the election.