Sterns horror

I recently went into sterns crestato purchasing 2 wedding rings, male and female via lay buy. 1st purchasing female one and then purchasing the male ring, when capturing the details it was incorrectly captured both times with the incorrect price on both rings. When returning to have it corrected I was advised that the contract has already been created and I must pay the full amount for both rings and only then can they assist with a refund, this has now affected my entire wedding planning and possibly have to delay the ceremony... I did not make a mistake but now have to suffer because details could not be captured correctly.