Q: mac scam call / fake assistance

Hi

I was watching a movie and a pop up came saying that the mac has been affected by a trojan virus with an error 268D3 and to unblock the mac I should have called the assistance number 0808 238 0**3. Very silly of me I called the number and I realised straight away that it wasn't Apple assistance, I said that it wasn't my mac but my boyfriend so couldn't provide any details and they hung up the call.

Is there any chance they can enter any sort of personal details from that call? Is there any connections to reach debit/credit card number?

That was very silly to do, now I am worried if the can have access to any kind of informations.

Thank you

<Personal Information Edited by Host>