Are Discovery Miles a ****?

Discovery Vitality continue to change the way Vitality members are rewarded for reaching their exercise goals, seldom to the benefit of the member. The latest iteration of their rewards programme sees members receiving Discovery miles for achieving their goals. However, I have found it impossible to spend the discovery miles, continually being told I have zero miles when I have a healthy balance. I have made numerous attempts via the Discovery call center and through emails to try and resolve this issue, which has been ongoing since I first attempted to spend my Discovery miles at the beginning of January. Discovery simply do not respond to the emails. This is not only appalling service on the part of Discovery but makes me suspicious that the Discovery miles programme may be a swindle on the part of the company. It costs them nothing to provide you with Discovery miles, I am unable to spend the miles so they incur no cost there, and then fail to respond to your many requests to resolve the issue suggesting that they have an incentive to leave the miles unspent. I am not sure if anyone has experienced similar? I have now given up trying to communicate with Discovery as any customer communications see to disappear into some black hole. I am not sure if this is an ethical or effective way for Discovery to deal with legitimate customer concerns, although it would seem to be a highly effective if highly questionable way for them to avoid their commitments to customers.