Cant get a response from anywhere, whatsapp call ignored, call centre cuts off

Virgin doles out wonderful vouchers for gym attendance. Unfortunatedly, they are not redeemable. I have been trying to get iso-whey from Dischem for a month now. Vouchers are expiring left right and centre. I logged a compalint on the whatsapp line which promised a response in 24 hours, 3 days ago. I called three timess, cut off halfway through every time. The last chap was re-instating vouchers when I was trying to tell him they cant be used, he was going to escalate and got cut off. Call centre lines are hopeless. I'm surprised they even bother. I only come onto HelloPeter when there is no longer another option and am disappointed they are not on HelloPeter.