Opodo complaint: Change of tickets without ation of customer

Hello
I booked 2 tickets Bangkok to Barcelona 7 June
Barcelona San Jose – Costa Rica 8 June
I later called an agent to understand what would the OPTIONS to change the flight by one week as I was having visa issues with another trip I need tot ale for work
I specifically mentioned on more than one occasion on the call to please NOT CHANGE ANYTHING UNTIL I CONFIRM BY EMAIL
3h later I receive a message that my flight was changed
I immediately wrote, called, got promised to be called back but didn’t happen
I just spoke to an agent who tells me I can’t get the tickets I actually bought because they were changed and it’s too late- i ask to speak to a supervisor who hangs up on me. I asked to listen to the recording to check that I had specified I didn’t want any changes without my ation and I’m being lied to that it was agreed during the call.

1- I would expect Opodo to find me a solution to give me the tickets I have booked and paid for on 7 and 8 June
2- I would like to access the recording to prove I never consented to changing my ticket without my ation so this is a fault committed by Opodo which I should not have to bare the consequences of

3- I would appreciate being called back as I have spent so long trying to reach someone who never picks up and spent countless emails of complaints