Customer service are good .I use paytm and its a very good app for reacharging phones , booking train ticket , airplane ticket and also you can pay bill of anything using paytm quality of there product are awesome .according to there price of the qualityvof product are well . And the deliver product within due date .iys app and website both are good but I suggest to use mobile app .
Allthough the app is very reliable and very easy ro use every one can use it easily .so use it to make your work easy of cashing .