Who can explain in-depth how to refund on Wish/Joom?

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I've been trying to do it like for a whole week...don't know how to refund free stuffs :sad:
Somebody, please, guide me. If you have time and patience - a step by step guidance i need rn.

1. Do i need to use VPN, how and which?
2. Where to get CCs? Or i use attaches payment details but how???