Waiting for a refund for a month

I changed my membership from a normal membership to a Vitality membership. I am supposed to get a refund and i have been waiting for a month to get it. Just called the call centre and the operator tells me i have to wait for another 4 working days. I wonder how many days you need to do a simple refund. My hard-earned cash is making interest for you in your account whilst i will only get it when it has lost some of its value. Interestingly, you will be on time to get your monthly subscription fee for August. I wonder if you can delay that by a month as well