Despite widespread discontent over Venezuela's economic collapse, most opposition parties made a decision to boycott the election after officials blocked their most popular leaders from competing against Maduro.
Maduro said in his speech that Robinson and Naranjo, whom he referred to as the head of the Central Intelligence Agency in Venezuela, both personally pressured several anti-government presidential aspirants not to compete in the race.
Speaking at an event at the election board, he promised to present evidence that the United States embassy had been engaged in a military, economic and political conspiracy. "Enough conspiracies", Maduro said.
Robinson has been less than a year in Caracas and is the highest United States representative in Venezuela, given that both countries have not exchanged ambassadors for eight years as a result of the conflicts in diplomatic relations since the so-called Bolivarian Revolution began in the South American nation in 1999.
"These illegal and unilateral measures constitute a crime against humanity and undermine the right for development of Venezuela, impeding people's access to basic goods", the statement read.
The US administration also declined to recognize the election and said that it would actively consider oil sanctions on the country.
Moreover the Venezuela's foreign ministry released a statement referring to the USA sanctions "a crime against humanity".
Washington has previously slapped sanctions on the president and his senior aides, and banned U.S. entities from buying any more debt from Caracas or state oil company PDVSA.
More than two million Venezuelans have fled the country in recent years, and their numbers may grow as the country's inflation rate is expected to hit 13,000 percent this year, the highest in the world.
"Venezuela is beginning to suffer an economic boycott by the United States and its allies, and this is going to be fatal to the regime", political analyst Carlos Romero told AFP.
Canada announced Monday it will not replace its ambassador in the Venezuelan capital of Caracas because of the "illegitimate and anti-democratic" re-election of President Nicolas Maduro.
The 14-member bloc additionally resolved to "coordinate actions in order that global and regional financial organisms do not grant loans to the Venezuelan government" in a bid to increase the pressure on the re-elected Maduro administration.
Most economists attribute the oil-rich country's economic collapse to years of mismanagement, corruption and a period of sharply lower oil prices.
On Monday an worldwide observer mission led by the Council of Electoral Experts of Latin America (CEELA), comprised of former top electoral officials from throughout the region, said the election was clean.
For global pressures to work, they should be stepped up, taken in unison and be accompanied by greater unity of Venezuela's opposition parties and escalating protests on the streets.
"Never have we witnessed an global attack as bad as the one that characterized this process", she said.
"This attack against Venezuela, which seeks to completely strangle the country, is unheard of", Vielma said, adding that Venezuela would continue to collect on its accounts receivable.