I have received a charge of $75.06 that I didn’t make

Karyn,

Was it really a charge on your account? Maybe it is a scam phishing message trying to scare you.

If it is a real charge on your account, follow the steps in here:

If you see 'apple.com/bill' on your billing statement - Apple Support

is it support.apple.com/billing to view your purchases, subscriptions, and for general billing information.

I am being charged on a purchase that I did not make

Diana,

See answer provided above.