Refund not received

I was charged the full membership rate at the beginning of March instead of the Vitality discount rate due to an issue with Vitality activation. I reported to the club the next day, and was assured a refund would be processed after paying my full Vitality activation fee on the 3rd of March. To date, I have not received this refund that I was promised. The sales person I have been dealing with has been friendly and helpful whenever asking for an update regarding the matter, however the approved refund has still not been received more than two weeks later. Could this please be expedited?