Fitbit not syncing heart rate

I bought a Fitbit HR which is endorsed by Vitality only to find out that it cannot read the heart rate. How does Vitality endorse and approve a product without doing their homework first. After many calls to the call centre and e-mails I was told that I would get feedback on the way forward by 15th March, which needless to say has come and gone. I bought the Fitbit HR because it was wristbased and did not want a heart strap. I was told that they would exchange the Fitbit and I have yet to hear about when this is going to happen. I would like my money back so that I can get a product that works ****il Discovery decides to change that too!). I have already provided my details and receipt.<br> This is so frustrating!!!!<br>