The introduction of the smart-card public transport revolution was branded a failure last night after a first day marred by confusion and computer problems. The Octopus contactless card system has been designed for use on six transport services. Democratic Party transport spokesman Zachary Wong Wai-yin said his office had been inundated with complaints about the card. Some passengers said they were charged twice when passing through turnstiles. Mr Wong called for an immediate halt to the card system, which he said needed further testing. 'We emphasised that this system be fully tested before use and it seems to have not been the case. This is totally unacceptable,' he said. Technical problems dogged the system on several Kowloon Motor Bus and Citybus vehicles. A KMB spokesman said bugs in the system's computer software had been detected late last week. 'This is state-of-the-art technology so there may be some bugs giving us teething problems,' he said. 'We will monitor the situation through the week.' KMB had placed announcements in newspapers advising commuters using the card to have change ready as a backup. Both KMB and Citybus said problems with the card should be rectified by the end of the week. Yuen Long District Board member Tang Chuen-wan said passengers were confused by rate scales and disappointed that Octopus card savings were not as good as with the existing system. 'Although the rail companies have appointed extra staff to assist them at the turnstiles I think there should be much more publicity,' he said. 'Many people are confused.' Mr Tang advised commuters to return faulty cards for a refund. A spokesman for Creative Star, the joint-venture of five transport operators which is behind the card, said performance was being 'fine-tuned', but should not affect general operations. 'If there is a problem, passengers should approach Octopus outlets,' she said. The system, which automatically deducts fares as passengers pass turnstiles, has been touted as a speedy and convenient alternative to common stored value tickets. The card is intended to be useful for frequent trips and to eliminate the inconvenience of fumbling for loose change on single journeys. The cards, with a stored value of up to $1,000 and requiring a $50 deposit, can be used on KMB, LRT, KCR, MTR, Citybus and Hongkong and Yaumati Ferry services.