Why is Apple billing me 77 dollars every month?

See the Apple Support article(s) below. Link to contact Apple Support in the article.

Apple ID - If you see ‘itunes.com/bill‘ or an unfamiliar charge on your bank, credit card, or debit statement.    *

Hello ~ Take a look here:

Subscriptions and Billing - Official Apple Support

~Katana-San~

if you have already tried the suggestions in the link above - Request a refund for apps or content that you bought from Apple - Apple Support, then please select Get Support at the top of this page.