India's Narain Karthikeyan has told Sebastian Vettel not to act like a "cry-baby" after the F1 champion started things by calling him "a cucumber" for causing a collision at the 2012 Malaysian F1 GP on March 25.Vettel, chasing a 2012 title hat trick for Red Bull, was 11th and out of the points at Sepang after tangling on track with HRT's Karthikeyan.The 24-year-old German, now sixth overall and 17 points off the lead, directed his anger at Karthikeyan after the incident; Red Bull team boss Christian Horner accused the Indian of "brain fade".'STEWARDS DIDN'T CARE'"For a World champion to say things like that is really shameful," Karthikeyan told India's Hindustan Times newspaper. "It is really unprofessional. For a driver who has achieved so much to take out his frustrations on me just because he is having a difficult year is really sad."One does not expect a professional sportsman to be such a cry-baby."Stewards decided Karthikeyan caused the collision and handed him a drive-through penalty after the race which meant 20 seconds added to his race time. The Indian, however, said his version of events had been ignored."They didn't care about what I had to say because Mr Vettel told them God knows what when he went and talked to them," he told the paper.