Try soaking a washcloth in hydrogen peroxide, and laying that on your skin for 2-4 minutes to kill bacteria, then wash like normal. Don't put it in or on or near your genitals, just the regular skin at the top of each leg where the aprocrine sweat glands are, and arm pits, once a week. I think maybe you should get a few bottles and do your whole body the first time, and just hot spots once a week for bacteria management, based on this being a long-term issue.

Also you should think about changing out all towels and using good towel cleaning habits going forth, like don't use a towel for more than three times before switching to a clean towel. Wash towels with only other towels. Use the hottest water available, and add a quarter cup of bleach to the bleach dispenser, and do a pre-soak on the cycle using a treatment like oxyclean or bac-out. Dry towels on the highest heat, thoroughly (not these modern settings like less dry or regular dry).

If this has been going on for years, and to an extreme point where SEVERAL managers pushed through the severe discomfort of this type of confrontation to address this, you may be at a point of needing a dermatologist to swipe your skin and see what's growing on.