Ring Resizing

My boyfriend bought me a ring for my birthday on Saturday, 20 January 2017. The lady who helped us at Mossel Bay branch at Langeberg Mall, said that we can resize the ring at any branch. I currently live in Jeffrey's Bay so I decided to do it at the branch at Fountains Mall, Jeffrey's Bay. The lady there said that she is unable to do a resize more than 2 sizes up or down from the Standard size (N). Why would they recommend resize at any branch without disclosing the policy that is has to be within the 2 sizes? I don't mind paying for the resize, but not want to resize their own product at all is unacceptable...saying it's too big risk to do it and gave me the number of someone else to do it who is even more expensive who would take the risk on himself resizing it more than 2 sizes up. No one has the same size hands or fingers, unfortunately I have big hands. We will never buy from them again, we would rather buy from a store with better customer service who would sell a ring and resize it according to one's needs and within the warranty of the ring, and tell you before hand what the policy is regarding resizing. If you can't give service to your customer, don't sell the product...