Disgusted by deceit

Bought a wedding ring set at American Swiss Southgate Mall on 17/08/20. The wifes ring a perfect fit but mine too big. The guy (Zakhile) helping me says that ring can be re-sized to fit, no problem. Two weeks later(01/09/20) i take it back (with my receipt & box) to have it sent for alteration. I hear now that i have to pay R319 to have it done. The guy that helped me is not at work on the day and his colleagues contact him to chat to me. He blatantly denies the fact that he omitted to inform me of the charges that would be involved for re-sizing. My question to him then...and his colleagues instore was "why would i buy a brand new ring that doesn't fit and then pay additional charges to have it re-sized when i could have gone elsewhere and bought it to size without these hassles?" No one could answer me but kept insisting on payment for the job to get done because they don't do it themselves[ American Swiss] but a 3rd party...disgusted!!!