Unauthorized Paypal INST XFER

[Smiped]

Hi guys I just logged on to my bank account and in the transactions I see two "PAYPAL INST XFER LARSONROBBER WEB ID: PAYPALSI77 - $25.00" transactions (total $50.00) and another "PAYPAL INST XFER MKATHLEEN83 WEB ID: PAYPALSI77 - $6.50" transaction. The first transfer with the name "LARSONROBBER" is kind of blantant that this is a scam transaction that I did not authorize.

I never authorized these payments and in fact I rarely ever spend on my bank account so I'm certain I've never mistakenly bought something that I didn't realize. I am trying to dispute the transaction online through PAYPAL but I cannot seem to find the transaction ID. Help please!

[Realpens]

Ditto here from a credit union account. I thought that I forgot to select "credit card" but this TX doesn't show up in my PP account. $76.46. However, I have other tx which also show up as  PAYPALSI77, so I am at a loss.