Incorrectly charged and i am responsible to check as per Toys R Us customer services!!!

I purchased some dolls in December for my girls and noted after paying the pricing of the dolls was incorrect to what was advertised on the floor I raised the issue and was asked for the receipt etc and sent, I am told that I am liable to check and make sure I am charged correctly - really, Toys R Us??? The mere fact is that someone did not do their job a placed those dolls on the incorrect section or did not advertise the correct price, why must I check this as a customer coming to your store to spend my money??? Pathetic, I will never ever buy at Toys R Us again, ever Priya who was dealing with the matter cannot even give me the store manger email, wow, such excellent service Toys R Us