Cancellation of my vitality discount.

I am am member of Discovery Vitality and to my understanding my gym subscription was supposes to be R250 per month as I qualify for Vitality discount. To my surprise last year (2015) November and December i was charged more than R700 for membership. I phoned, Virgin Active Call center and they told me that my Vitality status was cancelled. This is not true, because I am still paying my monthly vitality fee. i have been told by the Consultants to phone discovery vitality which takes for ever to pick up my phone. the worst thing i phoned Virgin Active two weeks and they promised to give me feedback within 48 hours, but there was no feedback given to me. this is the second time Virgin active is doing this in my account. they did the same in november 2014 and december 2014