Android Users: Follow it carefully
https://support.google.com/googleplay/answer/2479637?hl=en

iOS Users:
https://support.apple.com/en-in/HT204084

Other ways
Razor Gold right now is disabled, soon maybe it can be allowed again(Not Sure)
If you have used codashop then please contact them about refund.
If you have used any other way then please contact the respective 3rd party/company regarding your refund. Thanks.