1200€ As you say you do not have the booking…
I do not have the original Gotogate booking reference anymore, but I have provided clear documentary evidence from the airline confirming what happened. Aeroflot confirmed by email that my e-voucher No. 7685257894 had been blocked so that the refund for my unused ticket No. 5559466035811 could be processed due to the COVID-19 cancellation. The airline also confirmed that the ticket status was EXCH (OK) and specifically instructed me to contact the agency where the original ticket was purchased, because the agency had to request authorisation from PJSC “AEROFLOT-RUSSIAN AIRLINES” to process the refund via the BSP agency system. That agency was Gotogate. So this is not a case of me being unable to prove the booking existed. The airline itself confirmed that the refund had to be processed by the agency. The issue is that Gotogate failed to process/return the money properly and kept avoiding responsibility. The amount outstanding is approximately €1,200 for cancelled COVID-era flights. Please stop using the lack of an old booking reference as an excuse when the airline documentation clearly identifies the voucher, ticket and refund process. I am happy to provide the documentation again privately if you genuinely intend to resolve this.