i can't link my mastercard to paypal

[Exrchan]

hello,
i tried to link my mastercard to my paypal to activate it i was working i was in step which he ask me for the 4-digit code but i didn't understand where can i find 4-digit code so i tried some codes like csc and last 4 numbers in my card and now my mastercard canceled and i can't link it again i tried to contact to the support but there are no answer 

[kernowlass]

@Exrchan

The code would show on your card statement as that is how they verify your card.

If you have just put in random numbers then after 3 attempts it would be voided.

You then need to contact customer services to see if they can re-set it for you.