In the case your deposit gets declined by the chosen payment method, usually this can be resolved easily.
For Skrill and Neteller, make sure you are using the correct credentials and that the amount in your account is sufficient for the transaction you request.
For credit/debit cards, make sure you are entering the correct information in the relevant fields (card number, CV2, cardholder name, expiration date)
Some Banking Institutions might have limitations or even block transactions to gaming companies.
We advise you to firstly contact your card issuer in the case where you insert your information correctly, but your transaction is not getting approved.