O2 Partner Shop (SimArena Pankow) overcharged €10 via PayPal for Prepaid S

Hello,

I am an international customer and recently went to the O2 partner shop "SimArena" in Pankow to buy an O2 Prepaid S SIM card. The employee insisted on charging me €20. Because I was stressed and did not have Euro cash on me, they had me send the €20 digitally via PayPal. They refused to provide a physical paper receipt.

Now that I log into my O2 portal, I see my plan is active (€9.99) but my remaining balance is only €0.01. The shop kept the extra €10 for themselves as an unauthorized activation/service fee.

I have the digital PayPal transaction confirmation showing the exact timestamp and shop details. Could an O2 moderator please investigate this partner shop, report their behavior, and credit the €10 back to my prepaid balance? Thank you!