Cool ideas producing false billing statement but blame their system for it !!

Cool ideas is a huge reputable company that supplies good fibre and connectrivity service but their admin and account services suck big time. I've paid more than i should and thus have a credit which they tell me but cannot show it in basic statement of when I paid what on which day for the past 6 months. They keep blaming 'the system' can only generate a normal statement. This is a false statement not reflecting any dates when i've paid nor how much. IT does not reflect my credit ? How pathetic !! You sponsor Carte Blanche but maybe one should ask Carte Blanche to investigate your accounts and billing system ??