Slumberland Furniture Promised 12 months no intrest/no payments and now I owe payments with late fee Springfield, Missouri

My family recently visited the Slumberland, Springfield, MO, store to purchase a reclining couch.  We knew we weren't going to make a purchase unless we could receive no interest and no payments for 12 month and made that clear to the sales professional.  The sales professional, Derick Broyles, was helpful and made it clear that if our credit was approved we would qualify for no interest and no payments for 12 months.  We were approved with surplus and as we signed the paperwork we again confirmed that there would be no payments for 12 months.

I should have READ the paperwork in detail rather than extend good faith.

We've now received our second bill, bills which the sales professional told us we could ignore, with an attached late fee and must pay the Wells Fargo financial institution the payment.  While Wells Fargo was not able to waive the late fee since this was not a Wells Fargo error they did offer to amend the financing with agreement from the store.

I contacted the store to see about verifying or correcting the financing but was informed that Derick no longer works there.  A woman named Judy was quite adamant that no interest/no payment finance options did not exist in the Slumberland store.  This seemed to contradict what Wells Fargo associates told me, in that they would alter the financing with store approval.