LOOP on changing IBAN

[dano]

Good morning,

i made up a stealth account with forced MP. I inserted a wrong IBAN, and now i need to change it, when i go to chenge the security system tells me to insert old iban and a code received on the phone number. I do it correctly but when inserted both data, verification start again in loop. There is no way to pass it. Any other one meet this problem?

Thanks