Charged for blocked content services purchase.

Last year December, I messaged you about irregularities with my bill, and it was found that it was due to content purchases. I was advised to block it to avoid it happening again. I did that, but I realised again that my bill had increased. I just logged into the app to find out that it was due to these content purchases. But the blocking was active, can you please tell me how. And this has been happening since March, can you please explain how this happened??? NB: the sim card is always in the router.