Reliance Bigtv — channels not properly coming

From long time i am unable to watch so many channels. I have tried contacting customer care but unable to reach to them. Now channel which where coming having issue in display. So tel whom we reach out for this if your customee care is not responding then where should we go. Also this for sure last month for reliance big tv connection if its not resolved i will switch to another connection and will try to post about this on all social media.