BJP leader Suvendu Adhikari, who is pitted against his former protege and TMC supremo Mamata Banerjee from the high-profile Nandigram assembly seat, on Friday urged people not to vote for "outsiders", as he flayed the ruling party for betraying the trust of people.

Adhikari, who recently became a voter in Nandigram from Kanthi in East Midnapore district, filed his nomination from the seat a short while ago.

Adhikari filed his papers at the sub-divisional office in Haldia after leading a-km-long roadshow.

"I am 100 per cent confident of my victory in Nandigram.

The people of the area are with me. I am the son of the soil," he told reporters.

Union ministers Dharmendra Pradhan and Smriti Irani took part in the rally before Adhikari filed the nomination papers.

Adhikari, who switched over to the BJP in December, is up against the chief minister who decided to challenge him at his home ground.

Adhikari won the Nandigram seat as a TMC candidate in 2016 by bagging over 67 per cent of the votes, defeating his nearest rival of the CPI by a margin of 81,230 votes.

Adhikari has been calling himself "bhoomiputra" (son of the soil) and dubbing Banerjee as an outsider in Nandigram as she does not cast her vote there.

The feisty Bengal leader who represented Bhowanipore seat in the West Bengal assembly since 2011 has given up her tradition seat in favour of Nandigram.

He also asserted that people duped by the chit fund companies in the state would get back their money if the saffron party is voted to power.

"If we are voted to power, we would ensure all the duped investors of Chit Fund scam get back their money. The properties seized by ED and CBI would be auctioned to return money to the duped investors.

"The Chit Fund scam happened because of the TMC government, their leaders looted public money," he said.

He claimed that the Trinamool Congress has turned into a private limited company, where other leaders "neither have a say in policy-making of the party nor in the state government".

"Everybody else, apart from the aunt and nephew (Mamata and TMC leader Abhishek Banerjee), are lamp posts in the party," Adhikari said.

The Nandigram assembly constituency is set for a high-octane battle with Banerjee deciding to contest from the seat against Adhikari, who recently switched over to the saffron camp from the TMC.