I tried to buy premium credits but didn't get any

Hello, thanks for flagging this.

There is a chance this is caused by a caching issue, please can you try and hard refresh the browser to see if this solves the issue. Here is a resource on how to do so: https://fabricdigital.co.nz/blog/how-to-hard-refresh-your-browser-and-clear-cache

Let us know if this solves it.

All the best,

DP Team