Luanda - One of Angola's main opposition parties plans to contest the results of last week's general election, alleging unfair conduct during the vote that kept the ruling party of former president Jose Eduardo Dos Santos in power.The ruling MPLA party won just over 61 percent of the votes cast on Wednesday and about 150 of the 220 seats in Parliament, according to election commission officials, which would put a Dos Santos loyalist, Joao Lourenco, in the presidency.But the National Union for the Total Independence of Angola (UNITA) has accused the government of manipulating the vote, for example by depriving opposition groups of media access."We do not accept these results, not because they show the MPLA in front, but because we don't think they are true," said deputy party leader Rafael Massanga Savimbi.He said UNITA had found "substantial differences" between its own tallies at voting stations and those of the electoral commission."We are going to the courts," said Savimbi, son of the UNITA founder Jonas Savimbi, whose death in 2002 during the civil war against Dos Santos's forces paved the way for a ceasefire after 27 years of fighting."It's a crime to manipulate or distort the people's will," he said."I think that for the first time the MPLA has not won... We succeeded in mobilising the majority of people, Angolans voted overwhelmingly for change."The MPLA, which has ruled since Angola's independence from Portugal in 1975, had predicted it would easily win, but the result showed a fall in support from the last election in 2012.Opposition parties had hoped to tap into public anger over inflation that peaked at over 40 percent last year, as well as low growth and high unemployment.Dos Santos's long reign saw the end of Angola's bloody civil war (1975-2002) and a post-conflict investment boom as the country exploited its oil reserves.But a slump in crude prices since 2014 has hit the country hard.