The transfer finally arrived, even though with a delay.
Ten days ago they have sent an email that they were making changes to their routing of payments and I was given a new IBAN for my company. Six days ago a payment was sent to this new account and it hasn't arrived yet, although this is a transfer within the SEPA zone and it arrives to the destination account the same business day. I called their support twice, first lady told me they had not received that transfer (which is impossible), the second support agent said they might had received it but anyway it would be processed later and asked me to wait. None of them asked me any details about the payment nor attempted to look for it, which is quite strange in my opinion. I will write an update as soon as the situation clears up.
This bank offers top-notch services not only in the safekeeping of money but also in financial advice. I feel good that they also do business with a concrete agreement.