Efootball/PES Account Sale Issue – Threatened With Legal Action

Yesterday, I sold my Efootball/PES account, and the buyer asked if it was linked to a single account. I didn’t respond to that question, but when they later asked if there was any in-game currency left, I told them no. Now, a day later, they are threatening to sue me over the transaction.

I am only 16 years old, and I’m extremely worried because they have my personal information, including my national ID details. I don’t know what to do or if they can actually take legal action against me. Can anyone help me understand my rights in this situation? I need urgent advice on how to handle this before things get worse!