Unable to withdraw

My name is Brian Mohoje I have a problem with Casino Tropez everytime I try to withdraw money account I keep getting an error message that says 'Open API: network error' how when you deposit into the account there isn't any network problem. I have R1350 in my account. Despite the fact that they claim to be available 7 days a week from 06h00 to 00h00 I have written them an email which received an automated response I am however still waiting to be contacted by one of their consultant.