Hello again. I have received a reply from Redsys plugin support with this answer:
The final price is calculated by the backoffice (woocommerce), the redsys plugin does not have the ability to modify the amount.
Thank you very much.
Regards,
They don’t tell me anything else, right now I don’t know how to proceed because if one payment option does work correctly and the other doesn’t, I don’t know what could be wrong, honestly. And if they tell me that redsys does not have the ability to modify the amount, I don’t know what’s going on.
Greetings.
Thank you so much!