Sandbox tester account not able to add test cards for testing

Hello team , We have created a sandbox tester and added all the setting as per the guidelines but the sandbox tester account is blocked from adding the test card . All the test cards show as invalid card . We are not able to able to add wallet from iCloud . We are not able to sign into iTunes with the sandbox tester account . Please help on how to resolve this .

Thanks in Advance

Sandbox tester account not able to add test cards for testing
 
 
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