@Joy193
There is a software glitch that created a similar problem for me. I eventually got it sorted (I suspect because I posted on here about it and the CC moderators contacted CS), but I initially got the complete runaround by CS telling me that I either couldn't do maths or couldn't read properly?!
I have a First and a Distinction. That doesn't mean I don't make mistakes, but they tried to make out that I was an idiot. Turns out, it was actually their mistake.