Credit rating dispute

I noticed that my credit score appears to me inaccurate as I had previously built up a good credit score of above 750 with using a woolworths credit card and having a good payment history with Truworths, however despite having a good score it plummeted to 621 upon opening a credit card with Capitec almost as if there was no history of utilisation or built up good credit.

I have also looked at my credit score with Transunion which seems to take into account my previous utilisation and built up credit and that shows a good rating more in line to what it was prior to opeining a credit card with Capitec, however Experian does not appear to show history of usage and the score over the years and does not appear to be an accurate representation of my credit score.