While I can't help with extricating your data from the fruit factory's claws I do have a suggestion what to do next: get a 10-foot or 3 m pole and use it to distance yourself from them in the future. Self-host your data if possible, find a friend you trust who already self-hosts and see if you can hitch a ride, use some commercial service if necessary but don't allow yourself to get trapped within an 'ecosystem' again. If a company makes it extra hard to use things outside of their own control you should understand that they're not doing this for their users but to remain in control and maximise their chances of extracting as much from their captives as possible.

Don´t check in to Hotel Cupertino or soon you'll be singing along:

   Mirrors on the ceiling
   The pink champagne on ice, and she said
   "We are all just prisoners here
   Of our own device"
   And in the master's chambers
   They gathered for the feast
   They stab it with their steely knives
   But they just can't kill the beast

   Last thing I remember, I was
   Running for the door
   I had to find the passage back
   To the place I was before
   "Relax," said the night man
   "We are programmed to receive
   You can check out any time you like
   But you can never leave"