When I try to deposit, I get the message that a "technical error has occured".

If you receive a message that a technical error has occurred, we would like to ask you to repeat the deposit attempt after some time. You may not have enough funds in your account, so please check your balance before making a deposit. 

If you are still unable to make a deposit, please contact our Customer Service Team team with your first and last name, home address, date of birth and the email address you have in your ODDSET account and the exact error message.