Ring enlargement cost

I purchased a ring for my wife in February 2015. She took the ring to the Menlyn branch in April to have it made bigger and was told that a fee of R450 is payable for this service, which she had to pay. Yes, there is a time-frame given by Browns for the aforementioned service (from date of purchase) and I believe the said date was missed by a week or two. I however feel that having spent a sizable amount on this purchase at Browns, leeway can be given for ring enlargement.<br> <br> A mail from me through their website also went unanswered.