Uber India — charged high fares

I’ve mailed Uber so many times that they charged three times two times and they don’t have any platform to contact them other then mails and in mail they reply according to themselves now I’ve no option other than to choose file a case against them as they are not responding after trying to contact them again and again. They showed me price around 105-112 in both the trips but charged more than 320 rupees everytime.I am not responsible for any route diversion wheather taken by driver or the GPS. And adding to that on last Sunday without picking me up my ride was started and when I canceled it Uber again charged me for that these are unfair practices which regularly done by Uber now a day.