While there are some mistakes scattered here and there, they do not distract from the overall meaning of the sentence. Most of them are actually just simple punctuation or capitalization errors, so they don't hinder the reader from understanding what you're saying. I can guide you step by step for the correction of your errors. "Hi Good Morning Friends." should be "Hi, good morning, friends." In this case, you only need to capitalize the 'h' in "Hi" (since it is the first word in the sentence), and add in a few commas for the appropriate pauses in the sentence. "Today I woke up at 6.00 A.M. I came to office at 7.00 A.M. I am trying to improve my English through italki.com." is already perfect on its own. I just took the liberty of capitalizing the "I" in the first sentence since it is the subject. "Maybe it will help me further to improve my communication skills in English. I am working in a bank based in South Africa, so it is compulsorily for me to learn English fluently in order to communicate with my collegues and clients. I am working in a team consists of 8 members. As they are Africans and Whites, I have to talk only in English. As I am not fluent in English, they are unable to understand my language." Again, perfectly understandable sentences. Only mistakes I corrected were changing "may be" to "maybe," combining the second and third sentences since it would flow much better, and adding a comma after "As I am not fluent in English." Like I said earlier, your English is very impressive and coherent. The only thing I would suggest is remembering to put a space between your punctuation (periods and commas) and the first letter in the word after it. I apologize if my explanations were too overly-detailed, but I hope they do help you in grasping the language better. Happy learning~!

"1. My first suggestion is to read aloud as much as possible in English ALOUD. A standard daily English Newspaper and the Readers Digest have very good reading material. If possible record your voice and listen to it to know the areas the sounds, words and alphabets that give you trouble and on which you need to work. If possible read aloud to a friend who can give you his/ her feedback based on which you can work on improving your pronunciation as well as articulation. 2. The mother tongue influence is a problem for many considering that very few of us are native English speakers. To reduce that, make more English speaking friends and make a determined effort to speak only in English, even if you keep forgetting words, or tend to stammer or your friends tend to laugh at you. This will require a lot of will power but believe me you will soon improve. If someone corrects your pronunciation don’t take offense, instead be grateful that he/ she is helping you correct yourself. 3. I would also suggest you try to learn at least 3 -5 new words and look up the meaning in a dictionary. then try and use these words in your daily work and in your communication to improve your vocabulary. Find synonyms for words that give you trouble and use the synonym. 4. If you still feel that professional help is needed then you can attend English language training classes at institutes like inlingua. Their professional help will definitely help you in improving your communication skills."

not perfect writing but pretty close. I had no problem understanding what you wanted to say I'll let someone else correct the few mistakes.