Poor service and poor systems

I signed up to Vitality in July, in August I got my first cash back rewards. For Ugust, September and I assume October as well now, I have received no cashbacks. I have called to find out what the issue is and I was told that it was loaded but there is a system error. I have been in contact via email since then and do not even get a response. This is absolutely unacceptable that I have to wait over three months for cashbacks. Worse is the service and all the constant excuses received. Vitality does not seem worth it due to all their issues