Communication Skill please.. sighhh

I need to undergo at least one communication skill training, seriously. You see, i 've always encountered a situation where i have done my job correctly, but when my dear colleagues asked several questions for clarification, i suddenly became gagap (*) and i would give junks answer, sometimes it does not even related to the question. So how am i going to prove that 'Hey beb, i 've done my jobs la, you just see the result you'll know already what i've done is very accurate one! Action speaks louder than words, do i need to explain more.. haaa?' Hehe.. but i know in my case, i need to explain each and every single thing line by line and create my own story so that nobody would blame me. But as i am gagap(*), i do not where i have to start and where should i end and the whole thing will become berterabur(*). As the result, they will (always) assume that i have not done my job in correct way. Somebody please... i really need to have the skill now .. or never hehe. And off course, the training must be FOC. Communication Skill .. sighhh

(*) = please help me to replace this malay word into english, i have no time to lookup in google/dictionary =)