As @tobiasd4 says eBay will not get involved.  Buyers purchasing from business sellers are protected by law but trying to enforce those rights by a private customer is difficult and may involve opening a court case. Even "winning" the Court Case does not mean that you will get money back.  

The "authorities" who used to deal with this aspect have been starved of funds and suffered cuts.  In some locations Citizens Advice "gatekeeps" for Trading Standards and decides whether even to pass queries on!   @fastrack1966