The only way to overcome your communication problem is to consciously make efforts to reduce the errors in your pronunciation. In other words, you will need a lot of practice and training.
Here at SutraHR, we usually get a lot of job seekers who have the required skills and are fundamentally strong in their professional field but lack the confidence to speak in English or have MTI problems. We always advise them to "think before they talk" and "Think in English, to talk in English" - talking to yourself in the mirror. Day by day, your confidence shall increase.
Read as much as you can, watch Hollywood movies, listen to English songs, and surround yourself with learning. Hope this helps you overcome your problem. Do let me know how it is going :)
Regards