14K Gold Ring Resizing & Gold Quality Concerns - Customer Inquiry

Question
Dear Chris, I recently purchased a 14k ring from a seller who I asked to resize the ring from 4.5 size to 6 size.  The charge for the resizing was very inexpensive which is why I asked the seller to resizing this 14k ring for me.  
  I expected that the gold added to the ring to be 14k because the shank of the ring is 14k.  However, when I got the ring and tested it, it appears that the added gold is either 10k or lower than 10k because the part of the ring where the gold would have been added is not passing the 14k test(and barely passing the 10k test).  
  However, I tested the other area of the ring and it appears that the ring passes the 14k.  Therefore, I am assuming that the ring is 14k but the added gold when resized is most likely either 10k or lower than 10k.  
  I was never told that lower grade gold was going to be added to this ring but I have a problem with this ring now because I feel that it will be very difficult to have it appraised.  In addition, if I wanted to resell it down the road, I would think that I will have problem selling it because this ring contains mixed gold in the shank(i.e., I cannot sell the ring as 14k or 10k).  
   Is it legal for sellers/repairers to offer resizing without disclosing different gold grade added to jewelry?  
   I ask because I would like to return this ring to the seller for a full refund but the seller doees not want to refund me for the service charge for resizing.

Answer
I don't know if it illegal in your area however if it's not should be .  If I were you I would go back and ask them to please put a 14 karat plum sizing piece in your ring at no charge to you.  It is sad that 1 rotten apple has to spoil the whole bunch many stores do this and get away with it without people even checking.   I would definitely make sure that they did it at no charge to you and if they refused report that type of disreputable behavior to the Better Business Bureau.
Even better you might bring along a local television reporter to see if they would like to film an expose on his reaction.  
Good luck and let me know how it turns out please thank you.
C.