Dishonest communication

Over the course of this year up until September, I was tracking my Vitality Points. I just had 1 300 points to go to reach Diamond. As soon as I reached the 1 300 points, Vitality then change the points on my profile and say I need a further 8 800 points to go. This was in October. I have queried numerous times to find out why they communicated incorrectly and they cannot give me an answer. This is complete dishonest communication and disgusting service. And of course they get away with this disgusting behaviour. Not sure where the Treating Customers Fairly is? I am still seeking an explanation as to why my points changed so drastically?