Xbox UK Digital Store Overcharging The Werewolf: The Apocalypse Earthblood DLCs

Werewolf: The Apocalypse - Earthblood released recently, The UK digital store had it selling the Gaia bundle for £49.99 which included the game and both of the DLCS 'Champion of Gaia' and 'The Exiled One.' However at launch 'The Exiled One' was removed from the bundle since it was a pre order bonus and the price of what remained rose to £54.99. The two DLCs on UK Xbox are selling for £10.74 and £4.19 respectively however on PC and Playstation those DLCs are selling for £9.99 and £3.99 respectively. and on PC the Gaia bundle is £39.99 and on Playstation it is still £49.99. It appears to me that Microsoft deliberately increased the DLCs prices in order so they could get away with charging £5 extra for the bundle.

I've tried contacting them and tried to convince them to price match with Playstation at least and offer me a way to get the game bundle at the £49.99 price but they are refusing to do so. Why should us Xbox gamers have to pay more to fully enjoy the game compared to everyone else, and is there any way I can convince them to lower the price or get it at a better deal, I much prefer to buy the game digitally and don't want to have to wait for a sale in order to get it cheaper. What are my rights and who can I contact outside of Microsoft who can put pressure on Microsoft to lower the prices? I know Microsoft have full control over setting of the prices, but they shouldn't be allowed to rip off Xbox gamers and would be unfair if we couldn't challenge them if we felt they were unfairly overcharging us compared to everyone else. I know it's just DLCs but it's the principle of it, if they can get away with overcharging for DLC what else could they get away with.

:)