You don't agree with the decision?
If you say "I call" in poker, you called. You can't trick your opponent into turning his cards over, seeing that you are crushed and then say, "No, no... I didn't mean I CALL the bet. I meant I call a friend to help me out with this difficult decision."
I agree that his intent was not to call the bet, but he said the words "I call it now" and that's it. That's a verbally binding action, plain and simple. The ruling was correct.