I'm sorry eBay is a selling platform and cannot help with any delivery issues.
You can pay and send a courier to collect your item, but be aware this way, because you are not viewing the item yourself, you will not have any eBay buyer protection.
You should message the seller they may not wish for a courier to collect the item, as it's usual for a buyer to come themselves and check the item over preferably paying cash too.
Maybe best to ask them to cancel the order for you, again they are not obliged to.