Does ICT have a lower value than Computer Science and is the post-graduate realization the same for both? I am looking into the ACS program but the mathematics part seems like a part I won't be able to manage.

I'm not an ICT student, but wouldn't say it is a lower value, just a different focus. ICT will probably focus more on software and network systems (I might be slightly wrong), while ACS will focus more on embedded systems and hardware integration.

The mathematics for ACS start from high school level algebra, and they really ease you in. The difficulty progression is quite smooth, meaning you learn one thing at a time.

If you are not very good at maths at the moment, I would say you can still do it, you just have to make sure you do all exercises given by the professors which are a great practice.