Momentum Doesn't Want To Pay My Money Back!

I resigned from Momentum Health at the end of April and have in excess of R4000.00 in health savings due to me. They have told me that it wil take 6 months for them to pay me back my money. I don't understand this because since I'm unable to use their medical aid, surely there's no ways anyone could claim from my medical savings. I'm thoroughly upset by this. Momentum is holding on to my money, earning interest on it and I am the one ho is left to suffer.

Momentum has no regard for customer service and this should be *******. Pay me my money back please.