Opodo complaint: Very bad support and causing mental issues

I could not travel due to Covid restrictions and I cancelled my flight and then I asked for a refund. At first I was told by opodo staff to contact the airline for a refund. I did and airline said the ticket is non-refundable. I contacted opodo (late December 2021) and since I had paid extra for insurance, I was told that the insurance will refund in 25-30 days. I did not receive the money and I called back on 9 February 2022 and we went through the whole case again and I was told that I will be refunded in 5-7 days. I did not receive the money until I called again on 18 February 2022 and talked with a person in opodo and I was said that it was a misleading information and I need to wait 3-6 months until the airline refunds. I asked for a contact information of a manger or a supervisor where I was given an e-mail address which is not correct and the e-mails are returned and not delivered to.
I called back again and again I did not receive a reasonable reply.
I need to talk to someone who can provide me with the correct answer and resolve the issue before I raise the issue on social media and sue opodo due to the mental problems they created for me by considering me a foolish person.