I booked a ticket through eDreams who usually gives me a fictitious email address to use. For the first time ever, that email address didn't match with what Ryanair has for the booking.
As eDreams washed their hands, merely telling me to check in at the airport (I told them there's a hefty fee, but I seriously might as well have been talking to the wall), I contacted Ryanair, who of course would provide zero assistance without the correct email address...which is precisely what I don't know.
I made a second identical booking, and this time the email address I was given was correct and I've already added the booking to my myRyanair account.

So I've now emailed Tracy Kennedy and the Ryanair Fraud Department explaining the situation in detail AND attaching screenshots of my chat with eDreams. I asked for a refund of the first, defective booking, and then asked whether, in case they won't do this, they'd be OK with me doing a chargeback against eDreams, seeing as chargebacks against Ryanair results in a temporary ban from future travel until the funds are repaid.

My questions are: if I don't get any assistance from anyone at Ryanair, can I do a chargeback against eDreams without Ryanair then blocking me from travel?
Secondly, if I cannot safely do a chargeback, whom do I take to court? eDreams for failing to give me the correct email address, or Ryanair for refusing to work with me in any way whatsoever to access my booking?