Dear GVN Sekar,
I fully read your question. This language problem is not only with you, but exists with all Telugu speaking people. I have quite a few of them in my office and I corrected them to some extent through training and language labs.
The general flaws that they make is much applicable to you also.
1. Don't use SMS English while writing a letter or text. This wrong spelling becomes a strong habit.
2. Concentrate in grammar, tense, singular/plural, clauses and sentence formation.
3. Main error committed is in using the wrong past and past-participle in a sentence.
4. If it is written English, learn to apply punctuation and this would naturally be reflected in oral also. Even a blind man should be able to punctuate a sentence when you speak, i.e., the spoken version should reflect the presence.
5. Keep learning and writing as regular habit. Have dictionary when you do this.
6. Have somone who is strong in your circle to rectify when you speak. Do a group discussion regularly. Ask him to monitor the dialogues.
7. See to that your English phonetics shouldn't sound with telugu phonetics. (Eg: often pronunced as 'syllabus-su', 'book-su',). Avoid mother tongue influence.
8. Concentrate phonetics of 'z', 'sh', 'pa', 'pah', 'pe','pey','pay'... etc. Telugu friends pronunce 'Paper' as 'Pah-per', 'xerox' as 'gerox', 'zero' as 'gero'....)
9. They create new plurals like 'People-s', 'Police-s', etc. There is no plural form for this.
10. Avoid watching Telugu films, books and change your vision to readable English books. Try cross words, sudoku, scrabble, etc. You can try school non-detailed books, story books to understand the sentence formation.
11. Owing to these, you tend to have a fear of expressing thoughts into words.
Meeru nenu cheppinatuga thappakonda follow chesthey Englishlo matladi, chadivi, raasethaniki osthunthaiya. Idhi okattiyum brahma viddha kaadhu. Nenu writer, poet, authorga unnaanu. English kurinchi advice chestenum, meevariki telugulo oka maata cheptheyne naaku thrupthi.
At college, teachers would have taught you English through Telugu and the whole purpose is not served. When I visited some of the colleges there, I noted this.
Keep learning.
Regards,
Chandru