Cancelling Sky Sports/TNT Sports on Flex

I have been trying to have these removed for weeks now and have just been billed an additional £51 for packages I no longer want...And cannot remove! 

Can someone please help me? I have tried the online chat, multiple times and they try and tell me that they can't do anything...Except offer me a new package(at a cost more than my current one)! They say no one has access to my account to remove these, only I can...Except I can't...So it's a dead end! 

When I go into my Flex TV options, both on the website and app...TNT Sports is ticked, but it will not allow me to untick it...And Sky Sports isn't even ticked, so I can't remove it! 

I just want these removed. It's not Flex TV if you can't remove it...

Thanks in advance for any help.