Ebay seller has asked if it’s ok if they send a parcel in a weeks time as they are away at the moment?

I’ve bought a dance costume from eBay that I ideally would have liked to have worn for a performance on Saturday. The seller has messaged me informing me that they are on holiday and will not be able to send it until a week later and have asked if that’s ok. I’m pretty sure once I’ve paid it’s eBay policy for them to send within 3 days. I’m not sure whether to respond back saying it’s ok or what. What do you guys think? I want to do things the proper way and wanted the costume here for Saturday but maybe I’ll have no option but to wait :(

Ebay seller has asked if it’s ok if they send a parcel in a weeks time as they are away at the moment?
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