Regicarp Tecnics SL review: they stated that they didn't get the payment and took the problem to the court

We have ordered windows from Regicarp Tecnics SL. They delivered these windows with 3 months delay and within all these months they called us and asked to pay for the invoice. But our builder already paid for it, so we were confused. One day we got the letter from the court and it turned out that the company started case against us. In result we cleared the situation, and their windows were qualitative at all.