Why the payment to active my is plan is declined if I am using the same credit card that I used to b

I am trying to active my plan, however, the sysmtem says that the payment is declined and I don't understand why if is the same credit card that I used to buy the SIM. My credit cardt is fine, is activate and with credit line enable. Really I apreciate your help, becouse I need active my plan as soon as possible !

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