Mistake when buying

So I bought The 17.5k silver coins for 1k gold coins by accident. So I contacted the rovio trough https://support.rovio.com/hc/en-us/requests/new to try to get it reverted, but it has been around a week already. Is that the write place to get support for this game? Are they even still answering request for this game or should I give up on it and bite the bullet?  
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