No Client Services with regards to a Credit with Kulula

I am extremely disappointed with Kulula, I had a flight scheduled and due to covid I could not fly. They have transferred the funds to a Travelbank account to use as a credit, but I have send and email and contacted them several times as I do have the Travelbank ID, but do not get an email for password purposes. All I want to do is either book another flight or get a refund. I am struggling to get feedback from Kulula and it is a huge frustration.