In my credit card statement there are Apple.com/bill payments that I donot recognize. I didnot receive the invoice of those payments by email. They dono also appear in my list of purchases when I signed in with my apple id.

Hello ~ Take a look here:

Subscriptions and Billing - Official Apple Support

After looking through information above I would encourage you to contact your credit card company to make sure your information has not been breached and being used fraudulently.

~Katana-San~

For sure check again.

See the following Apple articles:

View your purchase history for the App Store, iTunes Store, and other Apple media services

View your purchase history for the App Store, iTunes Store, and other Apple media services - Apple Support

How apps, content, and subscriptions from Apple are billed

How apps, content, and subscriptions from Apple are billed - Apple Support

If you see "apple.com/bill" on your billing statement

If you see "apple.com/bill" on your billing statement – Apple Support (UK)

If you want to cancel a subscription from Apple

If you want to cancel a subscription from Apple - Apple Support

If the subscription that you want to cancel is not listed

If the subscription that you want to cancel is not listed – Apple Support (UK)

👉 If you see an unexpected charge: 

You can request a refund* for a purchase that you don't recognize, but you must pay for the purchase first. You can also cancel a subscription if you don't want to continue it.

*You must request the refund within the refund period.

Refunds are not guaranteed. For more information, see the Terms & Conditions.

See also -> Identify legitimate emails from the App Store or iTunes Store

Identify legitimate emails from the App Store or iTunes Store - Apple Support

If the invoice is not from Apple, was the money deducted by a stranger?

Contact your bank, they can find out who (name, address & account number) has collected the amount from your bank account, and when.

Depending on your bank, they can collect the amount back within 30 days.

Also report to the police.

Click here for more support and assistance.