My hair in my sims game keeps disappearing!?

So I have been having this problem for years now over and over. Eventually at some point in my gameplay my hair( all of it including the hair from the game not just cc hair) will just disappear! I have tried everything under the sun that I can think of but the only thing that fixes it (which is a temporary fix) is buying new cc from the sims store but even then it only shows some of the hair. I called EA and tried to as for help to no avail. I have uninstalled all of the games but again the same issue happens. I it is extremely frustrating as one of my sims in one game was a stylist and I was constantly changing people's looks. Please if anyone can help that would be amazing!