DISORGANIZED COMPANY. BAD EXPERIENCE!

My boyfriend booked for me a flight ticket with KLM, Sao Paulo-Amsterdam-Zurich (the final destination). 2 days before the flight I received an email informing that due to the Dutch regulations, I was rebooked with Iberia: Sao Paulo-Madrid-Zurich and this flight would depart 1 day later. OK. I rebooked my local flight (because I do not live in Sao Paulo. On the day of the flight, after staying in the long queue for check-in with Iberia, they did not allow me to fly, because I am from Brazil and could not make transit in Spain due to the pandemic situation in my country. They said I should go to tickets office sale of KLM and ask them to rebook another option. I went there and they apologized and put me back on the original route (GRU-AMS-ZRH). After another long queue to check in with KLM, also an impediment, informing that I was not allowed to do transit in Amsterdam, because of the situation of my country. They sent me back to the ticket office, then the new option was fly GRU-CDG-ZRH with Air France, but only in the next day. OK. very upset I needed to accept this or go back home. My boyfriend booked hotel for me, and on the Sunday Easter I would fly. However, on Monday morning I would need to work again, and the flight would arrive in Zurich only on Monday night. No way I could miss a working day after holidays in Brazil, then back to the tickets office on Sunday Easter, I said that their option would not be suitable to me and I would need to get my money back to try fly directly with Swiss (a reliable company). The guy in the ticket office just gave me 2 documents and said my boyfriend could apply for the refund online, through the same channel he bought the tickets. We tried when I arrived in Zurich and surprise: The booking code shows "not found". It just disappeared from the website. Now I want my money back. I tried to solve the problem through their WhatsApp number, call center in Brazil and website, but nothing is giving me a solution.