You should have inspect and tested the device before you confirmed 'Item
Receipt'on ebay.Once you committed that you are now at the seller's
mercy, he/she may or may not listen to you now.However,rather than
trying the seller you have an alternative ...
Such instances occurs by lack of coordination or even dedication in
broad sence.It is undesirable always on a site like ebay.Sellers must be
good for their words.Such issues are always worry for start-up sellers
like me.