[Resolved]  Times Internet Limited — regarding outdated et wealth magazine app on ios platform

I have subscribed to et wealth magazine on my ipad. It was working. But when i updated my ipad to ios 11, the app stops working. When i open it, it’s showing error with following message: the developer of this app needs to update the app to work on ios 11. I searched contact number of et wealth but i couldn’t get it. I tried to make contact from their facebook page but again there is no reply from them. Here my complaint is either they should update the app or refund my subscription charges.