You may Contact Goa Games via their live customer service chat which is available for all queries 24/7. If live chat was not available, there is also self help section, where you can select the issue you are facing and provide all information and submit your query then the customer service will reply and solve your query within few hours.
If you have problems related to recharge and withdraw you can contact them at: @goagamesdepositandwithdrawal_bot