I received a text stating I made a purchase. I never use wallet app or have any credit card stored.

From time to time, you will see texts or emails thanking you for purchasing something......(which you never purchased)......but mentioned that you can cancel things by clicking on a link or calling a toll free number. These are always scams trying to trick you into believing they are real so you will reveal personal info and passwords when you respond.

Delete messages like this immediately. NEVER click or tap on a link in these messages, no matter how "authentic" they might appear to be.

It is scam, remove it.

See the following Apple articles:

If you think your Apple ID has been compromised

If you think your Apple ID has been compromised - Apple Support

See who has access to your device or accounts

See who has access to your device or accounts – Apple Support (UK)

Security and your Apple ID

Security and your Apple ID - Apple Support

Recognize and avoid phishing messages, phony support calls, and other scams

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

Block phone numbers, contacts, and emails on your iPhone, iPad, or iPod touch

Block phone numbers, contacts, and emails on your iPhone, iPad, or iPod touch - Apple Support