If you meet the fact that the credit card is not being added, while adding the bank card to Getmancar service, and the operation of freezing of 1 (one) UAH is successful. Please, contact your bank, it is likely that:
There is a prohibition on internet transactions on your card
There is a limit / low limit on internet payments
The bank card has been blocked for acceptance-free payments
A low bankcard status (Visa Electron, Maestro).