Redbox Purchased DVD will not play , Internet

After notifying Redbox complaint was made to RipOff Report, offered to take back the DVD and refund the money.  While we use the same DVD cleaning solution on all DVDs we rent, that didn't help this one that was purchased.  Someone suggested using rubbing alcohol and using that caused it to play.  I told Redbox there was no need to return the DVD or to issue a refund because I would rather keep the DVD.  I let them know it was too bad I had to jump through this hoop to get the satisfaction I should have received in the beginning.  Thank you anyway, Redbox.