Guess what happened when they statred putting the pool up?

[b2001]

They might not agree to this either, but if you go with the wrong one, to be replaced by the right one eventually, I'd want to retain some portion of what I would owe them as an incentive for them to come back out and replace.

If they don't bother, you've got the partial refund.

[Poconos]

Mark,
Sounds familiar to some degree. Check this thread.
Al

http://www.poolforum.com/pf2/showthread.php?t=4018&

[NWMNMom]

OR, you could wait the week and have them come out and install the correct liner....I would try and get the wrong one in and get them to give you the correct one for later. A free liner is nothing to sneeze at!