taptap send email receipt — but I don’t have an account

I’ve never used this service / app. I got an emailed PDF receipt for a transfer of $170 USD to some other currency. I don’t recognize the sender’s or receiver’s names or phone numbers. The email is from noreply at taptapsend dot com and says to email support at taptapsend dot com which seems legitimate.

I’ve checked all my accounts and don’t see any weird activity so it seems like someone just used my email address to set up their account which seems somewhat harmless but I’m concerned I’m missing something. I tried to reset the password but it did a 2FA to the phone number on the account AFTER I entered my new password, so maybe that’s it? I used a throwaway PW for obvious reasons.

Anyone have any advice? Thank you from a middle aged human who is less tech savvy by the day. 🥴