What shoud i do if an extension developer not responding after taking money?

[Latest_viral (MJ Tec)]

Secured Countdown Extension v2.0 [PAID]

Some apps allow users to get extra coins or gems by pressing a button or by doing a task every few minutes of time like for instance, “Clash Royale” lets you open a chest of rewards every 24 hours and then you have to wait for another 24 hours. The task can be anything like spinning a wheel once a day (or once an hour), or scratch a card once in 24 hours, etc… [app_screenshot] If your app needs a similar element, then you’ll find this extension pretty helpful. It is possible to create such a …

I buy this extension