Mr. Sand less Cheaped out, did not seal floors properly. New Jersey

Mr. Sand less restored my wood floors In May of 2012.   They only used 2 coats of water based sealer.  After 3 months most of it rubbed off in my living room and dining room, where we get the most traffic.  When I say most traffic,  I am talking about 2 adults and a 4 year old (2years old at the time).  I had Mr. sand less come over and they told us we must have put harsh chemicals on the floor.  There is no way.   I have a 4 year old and the only thing I used on my hard woods was water to clean it.   I was so excited to have wood floors and to have them restored and  now they look horrible.  What a let down.  They will not honor this and wanted to charge me to fix it.   I had 2 other companies come and check the floors out.  They said that Mr. sand less only used 2 coats on the floor.  They should have used 3.  They said it was so easy to see that and they may have used a cheap mixture as well.  It has been 2 years since I had the floors done by them and 3 months ago, I got a splinter in my foot.   Last week my 4 year old got a splinter in his foot.   I have never heard of getting splinters from hardwood floors.  So upsetting.  Not sure what to do, as this is costly to resend and stain again, not to mention moving furniture out and back in the house.  Not sure what to do.  Do not ever use Mr. Sand less.