Refund not received

Hello,I come to you as my last resort, I got your contact from some colleague.I bought a concert ticket from Viagogo (EUR 319.68) in 2019 for an event in 2020. The event was post-poned (COVID) to June 2022. I decided to sell my ticket and it was successfully sold through Viagogo's platform but as per Viagogo conditions, I should receive my refund after the event had taken place (June 2022).Now it has been a year and I have not received my money yet. I have been in touch with them since last year. They have me stuck in a vicious circle of customer service without any specific actions to solve it. I am fed up. I have screenshots of all the messages back and forth where they deliberately do not take any clear actions.I would appreciate your help and support, this is very frustrating and bizarre. Thanks in advance!